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# Jenna's salary last year was 80% of what it is this year. By what perc

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Math Expert
Joined: 02 Sep 2009
Posts: 56300
Jenna's salary last year was 80% of what it is this year. By what perc  [#permalink]

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07 Dec 2017, 21:20
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Difficulty:

15% (low)

Question Stats:

87% (00:44) correct 13% (00:58) wrong based on 73 sessions

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Jenna's salary last year was 80% of what it is this year. By what percent did her salary increase from last year to this year?

A. 12.5%
B. 15%
C. 16.67%
D. 20%
E. 25%

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Re: Jenna's salary last year was 80% of what it is this year. By what perc  [#permalink]

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08 Dec 2017, 00:02
Bunuel wrote:
Jenna's salary last year was 80% of what it is this year. By what percent did her salary increase from last year to this year?

A. 12.5%
B. 15%
C. 16.67%
D. 20%
E. 25%

If Jenna's salary was 80% of what it is this year and her salary
was $100000 this year, it would have been$80000 last year.

The increase in the salary from last year to this year was $20000. Therefore, the salary increased by $$\frac{20000}{80000}*100 = 25$$%(Option E) _________________ You've got what it takes, but it will take everything you've got Intern Joined: 28 Jun 2017 Posts: 1 Re: Jenna's salary last year was 80% of what it is this year. By what perc [#permalink] ### Show Tags 08 Dec 2017, 04:27 This yr 100, last yr would have been 80% of 100 which is 80. Then use the percentage difference formula which is (difference) /initial *100. In this case 20/80 *100 which is 25% so option E Sent from my ONEPLUS A3003 using GMAT Club Forum mobile app Intern Joined: 12 Mar 2017 Posts: 15 Re: Jenna's salary last year was 80% of what it is this year. By what perc [#permalink] ### Show Tags 13 Dec 2017, 01:44 Let Jenna's salary this year be 1000$, then her salary last year was 800\$ as Jenna's salary last year was 80% of what it is this year.
Now, the difference between this year and last year is 1000 - 800 = 200.
So the percent Jenna's salary increase is 200/800=1/4 = 25%.

Hence, E is correct!

Kudos if you agree please, I still need many of them!
Re: Jenna's salary last year was 80% of what it is this year. By what perc   [#permalink] 13 Dec 2017, 01:44
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