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

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

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New post 07 Dec 2017, 21:20
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A
B
C
D
E

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  15% (low)

Question Stats:

82% (00:31) correct 18% (00:20) wrong based on 66 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%
[Reveal] Spoiler: OA

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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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New post 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)
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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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New post 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

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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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New post 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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