Find all School-related info fast with the new School-Specific MBA Forum

It is currently 26 May 2016, 06:16
GMAT Club Tests

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Company P had 15 percent more employees in December than it

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 33008
Followers: 5755

Kudos [?]: 70536 [1] , given: 9849

Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 08 Oct 2012, 01:49
1
This post received
KUDOS
Expert's post
7
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

70% (02:04) correct 30% (01:30) wrong based on 820 sessions

HideShow timer Statistics

Expert Post
2 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 33008
Followers: 5755

Kudos [?]: 70536 [2] , given: 9849

Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 08 Oct 2012, 01:50
2
This post received
KUDOS
Expert's post
4
This post was
BOOKMARKED
SOLUTION

Company P had 15 percent more employees in December than it had in January. If Company P had 460 employees in December, how many employees did it have in January?

(A) 391
(B) 400
(C) 410
(D) 423
(E) 445

Given: January*1.15=December --> January*1.15=460 --> January=460/1.15=400.

Answer: B.
_________________

New to the Math Forum?
Please read this: All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

2 KUDOS received
Moderator
Moderator
User avatar
Joined: 02 Jul 2012
Posts: 1230
Location: India
Concentration: Strategy
GMAT 1: 740 Q49 V42
GPA: 3.8
WE: Engineering (Energy and Utilities)
Followers: 105

Kudos [?]: 1160 [2] , given: 116

Premium Member
Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 08 Oct 2012, 02:31
2
This post received
KUDOS
No. of employees in December = 1.15 * No. of employees in January
No. of employees in January = No. of employees in december / 1.15 = 460/1.15
= 400

Answer is B.
_________________

Did you find this post helpful?... Please let me know through the Kudos button.

Thanks To The Almighty - My GMAT Debrief

GMAT Reading Comprehension: 7 Most Common Passage Types

1 KUDOS received
Director
Director
avatar
Joined: 24 Aug 2009
Posts: 505
Schools: Harvard, Columbia, Stern, Booth, LSB,
Followers: 12

Kudos [?]: 586 [1] , given: 241

Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 08 Oct 2012, 02:47
1
This post received
KUDOS
Number of employees in Jan = 460 /1.15 = 400
Answer B
_________________

If you like my Question/Explanation or the contribution, Kindly appreciate by pressing KUDOS.
Kudos always maximizes GMATCLUB worth
-Game Theory

If you have any question regarding my post, kindly pm me or else I won't be able to reply

1 KUDOS received
Director
Director
User avatar
Joined: 22 Mar 2011
Posts: 612
WE: Science (Education)
Followers: 90

Kudos [?]: 771 [1] , given: 43

Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 08 Oct 2012, 04:39
1
This post received
KUDOS
1
This post was
BOOKMARKED
Bunuel wrote:
Company P had 15 percent more employees in December than it had in January. If Company P had 460 employees in December, how many employees did it have in January?

(A) 391
(B) 400
(C) 410
(D) 423
(E) 445


Since \(15%=\frac{15}{100}=\frac{3}{20}\), it means that \(460\) represents \(23/20\) of the number of employees in January. Then, \(1/20\) of that number is \(460/23 = 20.\)
Therefore, the number of employees in January was \(20\cdot20=400.\)

Answer B.

PS Bunuel, just another small typo...see above (slution). And I am mad at myself, why I didn't see it before...
_________________

PhD in Applied Mathematics
Love GMAT Quant questions and running.


Last edited by EvaJager on 08 Oct 2012, 07:11, edited 2 times in total.
2 KUDOS received
Current Student
User avatar
Joined: 31 Oct 2011
Posts: 484
Schools: Johnson '16 (M)
GMAT 1: 690 Q45 V40
WE: Asset Management (Mutual Funds and Brokerage)
Followers: 38

Kudos [?]: 213 [2] , given: 57

Premium Member
Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 08 Oct 2012, 04:53
2
This post received
KUDOS
If J = # of employees in January, and D = # of employees in December..
D = (J + 15% of J) = (1.15)*J Plug in known values (D = 460)
Therefore, (1.15)*J = 460 Solve for J
J = 460/(1.15) = 400 B
_________________

My Applicant Blog: http://hamm0.wordpress.com/

1 KUDOS received
Director
Director
User avatar
Status: Final Countdown
Joined: 17 Mar 2010
Posts: 563
Location: India
GPA: 3.82
WE: Account Management (Retail Banking)
Followers: 16

Kudos [?]: 230 [1] , given: 75

Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 08 Oct 2012, 06:49
1
This post received
KUDOS
Let the no. of employees in Jan=x
Therefore the no.of employees in Dec will be =Total employees in Jan PLUS increased no of employees
=>{x + (15% of x)}
=> 1.15x

It is given that;
Total no.of employees in Dec = 460
so, 1.15x=460
solve for x , we will get x= 400

Answer: B
_________________

" Make more efforts "
Press Kudos if you liked my post

2 KUDOS received
Director
Director
User avatar
Status: Done with formalities.. and back..
Joined: 15 Sep 2012
Posts: 647
Location: India
Concentration: Strategy, General Management
Schools: Olin - Wash U - Class of 2015
WE: Information Technology (Computer Software)
Followers: 43

Kudos [?]: 476 [2] , given: 23

GMAT ToolKit User Premium Member Reviews Badge
Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 09 Oct 2012, 22:05
2
This post received
KUDOS
First, we need to determine which one to use for base January or December, that is whether,
J= 1.15D
Or
0.85J = D

The question says . employees in December are 15% more than in January. Therefore we are actually taking J as base and hence get number of employees in December as D=115% of J => 1.15J
Or 1.15J =460 => J =400 Ans (B)
_________________

Lets Kudos!!! ;-)
Black Friday Debrief

Expert Post
1 KUDOS received
Moderator
Moderator
User avatar
Joined: 01 Sep 2010
Posts: 2878
Followers: 654

Kudos [?]: 5181 [1] , given: 883

Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 11 Oct 2012, 03:39
1
This post received
KUDOS
Expert's post
please. experts can give an opinion about the level (real) of this question ?? of course I know that is not important the level but to solve it 300 or 700 no matter what

back to question.

J --------------- D

X 1.15

1.15 x = 460 X = 400 B in 30 seconds ( thanks to sleepless nights)

or 1.15 is what % of 460 ----> translate 1.15 = x/100 * 460 -----> = 4 only B fits the bill

C should not possible following this process of reasoning
_________________

COLLECTION OF QUESTIONS AND RESOURCES
Quant: 1. ALL GMATPrep questions Quant/Verbal 2. Bunuel Signature Collection - The Next Generation 3. Bunuel Signature Collection ALL-IN-ONE WITH SOLUTIONS 4. Veritas Prep Blog PDF Version 5. MGMAT Study Hall Thursdays with Ron Quant Videos
Verbal:1. Verbal question bank and directories by Carcass 2. MGMAT Study Hall Thursdays with Ron Verbal Videos 3. Critical Reasoning_Oldy but goldy question banks 4. Sentence Correction_Oldy but goldy question banks 5. Reading-comprehension_Oldy but goldy question banks

Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 33008
Followers: 5755

Kudos [?]: 70536 [0], given: 9849

Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 11 Oct 2012, 13:22
Expert's post
SOLUTION

Company P had 15 percent more employees in December than it had in January. If Company P had 460 employees in December, how many employees did it have in January?

(A) 391
(B) 400
(C) 410
(D) 423
(E) 445

Given: January*1.15=December --> January*1.15=460 --> January=460/1.15=400.

Answer: B.

Kudos points given to everyone with correct solution. Let me know if I missed someone.
_________________

New to the Math Forum?
Please read this: All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Manager
Manager
avatar
Joined: 28 Aug 2012
Posts: 52
Concentration: Operations, Marketing
GMAT 1: 510 Q36 V25
GPA: 4
WE: Information Technology (Other)
Followers: 0

Kudos [?]: 95 [0], given: 105

Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 16 Feb 2013, 12:19
Okay, so now i ve fallen into this really Stupid trap here . I got A) 391 . 15% of 460 is 69 . So i did 460-69 = 391 . I know i am wrong now and this is a dumb mistake . But what am i missing here ??
Kindly Help..
Thanks in Advance
3 KUDOS received
Moderator
Moderator
User avatar
Joined: 02 Jul 2012
Posts: 1230
Location: India
Concentration: Strategy
GMAT 1: 740 Q49 V42
GPA: 3.8
WE: Engineering (Energy and Utilities)
Followers: 105

Kudos [?]: 1160 [3] , given: 116

Premium Member
Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 16 Feb 2013, 12:57
3
This post received
KUDOS
1
This post was
BOOKMARKED
thinktank wrote:
Okay, so now i ve fallen into this really Stupid trap here . I got A) 391 . 15% of 460 is 69 . So i did 460-69 = 391 . I know i am wrong now and this is a dumb mistake . But what am i missing here ??
Kindly Help..
Thanks in Advance


If 100 is increased by 50%, we get 150.
However if 150 is decreased by 50% we do not get 100 and instead we get 75.
The mistake you are doing is thinking that a 15% decrease from 460 is the same as a 15% increase from the right answer choice.
From the above illustration, we can see that equating as such is incorrect.
_________________

Did you find this post helpful?... Please let me know through the Kudos button.

Thanks To The Almighty - My GMAT Debrief

GMAT Reading Comprehension: 7 Most Common Passage Types

Manager
Manager
avatar
Joined: 28 Aug 2012
Posts: 52
Concentration: Operations, Marketing
GMAT 1: 510 Q36 V25
GPA: 4
WE: Information Technology (Other)
Followers: 0

Kudos [?]: 95 [0], given: 105

Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 17 Feb 2013, 21:26
MacFauz wrote:
thinktank wrote:
Okay, so now i ve fallen into this really Stupid trap here . I got A) 391 . 15% of 460 is 69 . So i did 460-69 = 391 . I know i am wrong now and this is a dumb mistake . But what am i missing here ??
Kindly Help..
Thanks in Advance


If 100 is increased by 50%, we get 150.
However if 150 is decreased by 50% we do not get 100 and instead we get 75.
The mistake you are doing is thinking that a 15% decrease from 460 is the same as a 15% increase from the right answer choice.
From the above illustration, we can see that equating as such is incorrect.



Ah!, Thank you MacFauz :)
+1 to u
1 KUDOS received
Intern
Intern
avatar
Joined: 11 Aug 2013
Posts: 34
Followers: 0

Kudos [?]: 9 [1] , given: 9

Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 28 Oct 2013, 21:53
1
This post received
KUDOS
thinktank wrote:
Okay, so now i ve fallen into this really Stupid trap here . I got A) 391 . 15% of 460 is 69 . So i did 460-69 = 391 . I know i am wrong now and this is a dumb mistake . But what am i missing here ??
Kindly Help..
Thanks in Advance



I solved the problem by estimation, I won't try to explain that, just for the fact that 410 could be a trap. So I'll try to explain on BackSolving the problem.

Jan = 10% + +5% = December
391 39.1 (Stop Here)
400 40 20 460
410 41 (Stop here)
423 42.3 (Stop here)
445 44.5(Stop here)

Both Numbers must be divisible in order to arrive at 460

or Try to Solve this way:

J=15%+D
D=460

Solve for J = .15+460
Multiply by 100

46000/115 = 400
1 KUDOS received
Manager
Manager
User avatar
Status: Please do not forget to give kudos if you like my post
Joined: 19 Sep 2008
Posts: 128
Location: United States (CA)
Followers: 0

Kudos [?]: 65 [1] , given: 257

GMAT ToolKit User Premium Member
Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 24 Jan 2014, 10:08
1
This post received
KUDOS
just use the answer choices.

400*15/100=60 === 60+400=460. Ans B.
_________________

Please Help with Kudos, if you like my post.


Intern
Intern
avatar
Joined: 19 Jan 2014
Posts: 31
Followers: 0

Kudos [?]: 13 [0], given: 51

GMAT ToolKit User
Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 25 May 2014, 14:05
Bunuel wrote:
Company P had 15 percent more employees in December than it had in January. If Company P had 460 employees in December, how many employees did it have in January?

(A) 391
(B) 400
(C) 410
(D) 423
(E) 445

Practice Questions
Question: 57
Page: 159
Difficulty: 550


I'm having a problem.
I started solving this problem when December is x and January is 0.85x. IF x=460 shouldn't January be 460x0.85=391

Where am I going wrong?
Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 33008
Followers: 5755

Kudos [?]: 70536 [1] , given: 9849

Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 25 May 2014, 14:17
1
This post received
KUDOS
Expert's post
bytatia wrote:
Bunuel wrote:
Company P had 15 percent more employees in December than it had in January. If Company P had 460 employees in December, how many employees did it have in January?

(A) 391
(B) 400
(C) 410
(D) 423
(E) 445


I'm having a problem.
I started solving this problem when December is x and January is 0.85x. IF x=460 shouldn't January be 460x0.85=391

Where am I going wrong?


x is 15% more than y means, that \(x=1.15y\), or that \(y=\frac{x}{1.15}\approx{0.87x}\).

\(y=0.85x\) means that y is 15% less than x, which is not the same as x is 15% more than y.
_________________

New to the Math Forum?
Please read this: All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Intern
Intern
avatar
Joined: 16 Feb 2015
Posts: 10
Followers: 0

Kudos [?]: 1 [0], given: 0

Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 16 May 2015, 16:17
Not sure if anyone will answer me but why can't we use proportions to solve this? ie:

1.15/460 = 1.00/x ?
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 9633
Followers: 465

Kudos [?]: 120 [0], given: 0

Premium Member
Re: Company P had 15 percent more employees in December than it [#permalink]

Show Tags

New post 21 May 2016, 08:22
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Re: Company P had 15 percent more employees in December than it   [#permalink] 21 May 2016, 08:22
    Similar topics Author Replies Last post
Similar
Topics:
2 Experts publish their posts in the topic Approximately what percent of the employees with 5 or more years... sara86 2 15 Dec 2015, 14:08
1 Experts publish their posts in the topic At Company K, 15 percent of the employees are secretaries and 60 perce Bunuel 2 11 Nov 2015, 00:47
15 Experts publish their posts in the topic If Mel saved more than $10 by purchasing a sweater at a 15 p Bunuel 12 03 Feb 2014, 01:19
7 Experts publish their posts in the topic Among the employees of a certain company, 52 percent of the megafan 10 10 Feb 2013, 12:36
6 Experts publish their posts in the topic Of the 200 employees in a certain company, 25 percent will enigma123 9 26 Feb 2012, 15:29
Display posts from previous: Sort by

Company P had 15 percent more employees in December than it

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.