Author 
Message 
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 47015

Company P had 15 percent more employees in December than it [#permalink]
Show Tags
08 Oct 2012, 01:49
Question Stats:
74% (01:01) correct 26% (01:09) wrong based on 1588 sessions
HideShow timer Statistics




Math Expert
Joined: 02 Sep 2009
Posts: 47015

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
08 Oct 2012, 01:50




VP
Joined: 02 Jul 2012
Posts: 1193
Location: India
Concentration: Strategy
GPA: 3.8
WE: Engineering (Energy and Utilities)

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
16 Feb 2013, 12:57
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 46069 = 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




VP
Joined: 02 Jul 2012
Posts: 1193
Location: India
Concentration: Strategy
GPA: 3.8
WE: Engineering (Energy and Utilities)

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
08 Oct 2012, 02:31
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



Senior Manager
Joined: 24 Aug 2009
Posts: 479
Schools: Harvard, Columbia, Stern, Booth, LSB,

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
08 Oct 2012, 02:47
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



Director
Joined: 22 Mar 2011
Posts: 605
WE: Science (Education)

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
Updated on: 08 Oct 2012, 07:11
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.
Originally posted by EvaJager on 08 Oct 2012, 04:39.
Last edited by EvaJager on 08 Oct 2012, 07:11, edited 2 times in total.



Senior Manager
Joined: 31 Oct 2011
Posts: 480
WE: Asset Management (Mutual Funds and Brokerage)

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
08 Oct 2012, 04:53
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 JJ = 460/(1.15) = 400 B
_________________
My Applicant Blog: http://hamm0.wordpress.com/



Senior Manager
Status: Final Countdown
Joined: 17 Mar 2010
Posts: 492
Location: India
GPA: 3.82
WE: Account Management (Retail Banking)

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
08 Oct 2012, 06:49
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



Director
Status: Done with formalities.. and back..
Joined: 15 Sep 2012
Posts: 616
Location: India
Concentration: Strategy, General Management
Schools: Olin  Wash U  Class of 2015
WE: Information Technology (Computer Software)

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
09 Oct 2012, 22:05
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



Board of Directors
Joined: 01 Sep 2010
Posts: 3428

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
11 Oct 2012, 03:39
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 ALLINONE 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. Readingcomprehension_Oldy but goldy question banks



Manager
Joined: 28 Aug 2012
Posts: 51
Concentration: Operations, Marketing
GPA: 4
WE: Information Technology (Other)

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
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 46069 = 391 . I know i am wrong now and this is a dumb mistake . But what am i missing here ?? Kindly Help.. Thanks in Advance



Intern
Joined: 11 Aug 2013
Posts: 32

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
28 Oct 2013, 21:53
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 46069 = 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



Manager
Status: Please do not forget to give kudos if you like my post
Joined: 19 Sep 2008
Posts: 107
Location: United States (CA)

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
24 Jan 2014, 10:08
just use the answer choices. 400*15/100=60 === 60+400=460. Ans B.
_________________
Please Help with Kudos, if you like my post.



Intern
Joined: 19 Jan 2014
Posts: 26

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



Math Expert
Joined: 02 Sep 2009
Posts: 47015

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
25 May 2014, 14:17



Target Test Prep Representative
Status: Head GMAT Instructor
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2669

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
03 Jun 2016, 06:33
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 There are actually two great methods to solving a problem such like this. The first is create a simple word translation. We are given that Company P had 15 percent more employees in December than it had in January and that it had 460 employees in December. So we can say: D = number of employees in December J = number of employees in January J x 1.15 = D J x 1.15 = 460 J = 460/1.15 J = 46,000/115 = 400 Alternately, we could have looked at our answer choices and used divisibility and a little logic. We know that the answer choices represent the number of employees in January. Thus we can say the following: (Answer Choice)(1.15) = 460 Answer Choice x 115/100 = 460 Right away we can see that answer choice B stands out because it is divisible by 100. If we do the arithmetic, we see that: 400 x 115/100 = 400/100 x 115 = 4 x 115 = 460. Thus B is the correct answer.
_________________
Jeffery Miller
Head of GMAT Instruction
GMAT Quant SelfStudy Course
500+ lessons 3000+ practice problems 800+ HD solutions



Intern
Joined: 05 Apr 2017
Posts: 4

Re: Company P had 15 percent more employees in December than it [#permalink]
Show Tags
16 Aug 2017, 10:09
15% more in December = 115% (taking employees in January = 100%)
SO, 115% = 460 100% = (?) > 460 x 100 / 115 = 400 (b)



Manager
Joined: 07 Jun 2017
Posts: 177
Location: India
Concentration: Technology, General Management
GPA: 3.6
WE: Information Technology (Computer Software)

Company P had 15 percent more employees in December than it [#permalink]
Show Tags
15 Sep 2017, 00:16
115/100 = 460 then no of employee = 460*100/115 divide by 5 460*20/23 20*20 = 400 answer B
_________________
Regards, Naveen email: nkmungila@gmail.com Please press kudos if you like this post




Company P had 15 percent more employees in December than it
[#permalink]
15 Sep 2017, 00:16






