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Company P had 15 percent more employees in December than it [#permalink]
 08 Oct 2012, 01:49
Question Stats:
68% (01:52) correct
31% (01:13) wrong based on 5 sessions
The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions ProjectCompany 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
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Difficulty: 550 GMAT Club is introducing a new project: The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions ProjectEach week we'll be posting several questions from The Official Guide for GMAT® Review, 13th Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution. We'll be glad if you participate in development of this project: 1. Please provide your solutions to the questions; 2. Please vote for the best solutions by pressing Kudos button; 3. Please vote for the questions themselves by pressing Kudos button; 4. Please share your views on difficulty level of the questions, so that we have most precise evaluation. Thank you! _________________
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Re: Company P had 15 percent more employees in December than it [#permalink]
08 Oct 2012, 01:50
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Re: Company P had 15 percent more employees in December than it [#permalink]
08 Oct 2012, 02:31
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Bunuel wrote: The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions ProjectCompany 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: 600 GMAT Club is introducing a new project: The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions ProjectEach week we'll be posting several questions from The Official Guide for GMAT® Review, 13th Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution. We'll be glad if you participate in development of this project: 1. Please provide your solutions to the questions; 2. Please vote for the best solutions by pressing Kudos button; 3. Please vote for the questions themselves by pressing Kudos button; 4. Please share your views on difficulty level of the questions, so that we have most precise evaluation. Thank you! 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 _________________
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Re: Company P had 15 percent more employees in December than it [#permalink]
08 Oct 2012, 02:47
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Number of employees in Jan = 460 /1.15 = 400 Answer B
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Re: Company P had 15 percent more employees in December than it [#permalink]
08 Oct 2012, 04:39
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Bunuel wrote: The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions ProjectCompany 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: 600 GMAT Club is introducing a new project: The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions ProjectEach week we'll be posting several questions from The Official Guide for GMAT® Review, 13th Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution. We'll be glad if you participate in development of this project: 1. Please provide your solutions to the questions; 2. Please vote for the best solutions by pressing Kudos button; 3. Please vote for the questions themselves by pressing Kudos button; 4. Please share your views on difficulty level of the questions, so that we have most precise evaluation. Thank you! 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...
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Last edited by EvaJager on 08 Oct 2012, 07:11, edited 2 times in total.
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Re: Company P had 15 percent more employees in December than it [#permalink]
08 Oct 2012, 04:53
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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
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Re: Company P had 15 percent more employees in December than it [#permalink]
08 Oct 2012, 06:49
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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
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Re: Company P had 15 percent more employees in December than it [#permalink]
09 Oct 2012, 22:05
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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) Bunuel wrote: The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions ProjectCompany 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: 600 GMAT Club is introducing a new project: The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions ProjectEach week we'll be posting several questions from The Official Guide for GMAT® Review, 13th Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution. We'll be glad if you participate in development of this project: 1. Please provide your solutions to the questions; 2. Please vote for the best solutions by pressing Kudos button; 3. Please vote for the questions themselves by pressing Kudos button; 4. Please share your views on difficulty level of the questions, so that we have most precise evaluation. Thank you!
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Re: Company P had 15 percent more employees in December than it [#permalink]
11 Oct 2012, 03:39
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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
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Re: Company P had 15 percent more employees in December than it [#permalink]
11 Oct 2012, 13:22
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Re: Company P had 15 percent more employees in December than it [#permalink]
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
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Re: Company P had 15 percent more employees in December than it [#permalink]
16 Feb 2013, 12:57
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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.
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Re: Company P had 15 percent more employees in December than it [#permalink]
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
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Re: Company P had 15 percent more employees in December than it
[#permalink]
17 Feb 2013, 21:26
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