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# Abigail used to save 40% of her salary in 2013. Her salary increased b

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Math Expert
Joined: 02 Sep 2009
Posts: 60474
Abigail used to save 40% of her salary in 2013. Her salary increased b  [#permalink]

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05 Nov 2019, 01:35
00:00

Difficulty:

65% (hard)

Question Stats:

51% (01:35) correct 49% (01:59) wrong based on 59 sessions

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Abigail used to save 40% of her salary in 2013. Her salary increased by 100% in 2014 and by 50% in 2015, but her expenses remained the same throughout. What was the percentage increase in her annual savings over the two years?

A. 200%
B. 240%
C. 300%
D. 500%
E. 600%

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Joined: 05 Jul 2018
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Re: Abigail used to save 40% of her salary in 2013. Her salary increased b  [#permalink]

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05 Nov 2019, 04:15
2
1
IMO D 500%
Year | Salary | Saving
2013 | 100 | 40
2014 | 200 | 140
2015 | 300 |240

Savings went from 40 to 240 in 2 years.

Increase/Change in saving over 2 years= 200
Base =40

Percent increase = $$\frac{Change}{Base}*100$$= $$\frac{40}{200}*100$$ =500%

Hence D
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Re: Abigail used to save 40% of her salary in 2013. Her salary increased b  [#permalink]

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11 Nov 2019, 14:32
1
Bunuel wrote:
Abigail used to save 40% of her salary in 2013. Her salary increased by 100% in 2014 and by 50% in 2015, but her expenses remained the same throughout. What was the percentage increase in her annual savings over the two years?

A. 200%
B. 240%
C. 300%
D. 500%
E. 600%

Are You Up For the Challenge: 700 Level Questions

We can let Abigail’s salary in 2013 be $100. Thus, she spent$60 and saved $40. In 2015, her salary was 100 x 2 x 1.5 =$300. Since she still spent $60, she saved$240. Therefore, the percent increase in her annual savings over the two years was:

(240 - 40)/40 x 100 = 5 x 100 = 500

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Re: Abigail used to save 40% of her salary in 2013. Her salary increased b   [#permalink] 11 Nov 2019, 14:32
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