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

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19 Oct 2010, 08:06

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D

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66% (02:54) correct
34% (02:10) wrong based on 95 sessions

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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?

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

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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)

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

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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%.
_________________

GMAT Tutor and Instructor GMATGuruNY@gmail.com New York, NY

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

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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!
_________________

GMAT Tutor and Instructor GMATGuruNY@gmail.com New York, NY

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

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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:(

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

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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

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

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