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A company has 540 employees, 40% of whom are employed part time. If it

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New post 19 Oct 2010, 08:06
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A company has 540 employees, 40% of whom are employed part time. If it hires 60 new employees, 15% of whom are employed part time, what will be the percent increase in part time employees?

A) 1 2/3 %
B) 2 2/3 %
C) 4 %
D) 4 1/6 %
E) 9 %
[Reveal] Spoiler: OA
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Re: A company has 540 employees, 40% of whom are employed part time. If it [#permalink]

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New post 19 Oct 2010, 08:38
40% of 540 is 216. Then the company hires 60 people. 15% of the 60 are part time. This amounts to 9. Add 216 + 9 = 225. This is an increase from 216. So the answer is D (9/216*100)
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New post 19 Oct 2010, 08:43
Atrain13gm wrote:
A company has 540 employees, 40% of whom are employed part time. If it hires 60 new employees, 15% of whom are employed part time, what will be the percent increase in part time employees?

A) 1 2/3 %
B) 2 2/3 %
C) 4 %
D) 4 1/6 %
E) 9 %


There's actually a percent decrease in PT employees, so I don't understand what the question is asking.


The question is asking by what percentage the number of part-time employees will increase.

Original number = .4*540 = 216.
Additional part-timers = .15*60 = 9.
% increase = (9/216)*100 = 4 1/6%.
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New post 19 Oct 2010, 08:48
Thanks - the wording isn't that clear.
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New post 19 Oct 2010, 08:53
Atrain13gm wrote:
Thanks - the wording isn't that clear.


I can understand your confusion. The GMAT would likely make it crystal clear what was being asked:

By what percent did the number of part-time employees increase?
By what percent did the ratio of part time employees to the total number of employees decrease?

Hope this helps!
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New post 05 Sep 2011, 07:11
Hello !

I have just solved the problem and I wonder why there is a discrepancy between the actual answer and the answer choice D.

To me (9/216)*100 = 4,16666 which is not equal to 4 1/6 %

Or maybe it is because 4 1/6% actually means (4 + 1/6)% and not (4 * 1/6)% ? Is it an american way of writing decimal numbers (am foreigner) ?
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New post 05 Sep 2011, 09:47
Hi i have a small doubt it may be silly but iam confused,thanks to help me.

Actually 9 members were added to part time job.So the count has increased from 216 to 225(216+9).
So i thought 1st we should find 225 is what percent of 600 - 40%(the original) So that we can get the increase in the percent.
Can you plz tell me where did i go worng:(
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New post 06 Sep 2011, 08:12
yea i did the same mistake first... was getting 225/600 as 37% but since the question asked increase..

i reverted to the methods suggested above... if the overall percentage was asked.. i think we could have attempted such a method... but since the q asks percentage increase of part time employees, 9/216*100 i the approriate calc
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Re: A company has 540 employees, 40% of whom are employed part time. If it [#permalink]

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Re: A company has 540 employees, 40% of whom are employed part time. If it   [#permalink] 27 Sep 2015, 02:59
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