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by alex.gellatly » Tue Jul 17, 2012 9:52 pm
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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?

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by Anurag@Gurome » Tue Jul 17, 2012 10:07 pm
alex.gellatly 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?
Say, number of employees in January = J
Hence, number of employees in December = (J + 15% of J) = (1.15)*J

Therefore, (1.15)*J = 460 ---> J = 460/(1.15) = 400

The correct answer is B.
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by GMATGuruNY » Wed Jul 18, 2012 1:58 am
alex.gellatly 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?

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ALWAYS LOOK AT THE ANSWER CHOICES.
15% of the correct answer must yield an integer value.
Only answer choice B is viable.

The correct answer is B.
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by Scott@TargetTestPrep » Tue Jun 30, 2015 11:42 am
alex.gellatly 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?

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Solution:

There are two methods we can use to solve a problem like this. The first is to 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.

Answer: B

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by [email protected] » Sat Jun 16, 2018 3:16 pm
Hi All,

We're told that Company P had 15 percent MORE employees in December than it had in January and that Company P had 460 employees in December. We're asked for the number of employees it had in January. This question can be solved rather easily by TESTing THE ANSWERS (as Mitch has shown). It can also be solved with a bit of 'brute force' arithmetic.

To start, since 15% of 100 = 15, if we increase 100 by 15%, we end up with a total of 115. With every increase of 100 employees, that increase of 15% will lead to another 15 employees added to the total. This means that....
if we increase 200 by 15%, we end up with a total of 230
if we increase 300 by 15%, we end up with a total of 345
if we increase 400 by 15%, we end up with a total of 460

That last example is an exact match for what we were told, so that must be the answer!

Final Answer: B

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