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By what percent is 25 greater than 15?

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By what percent is 25 greater than 15? [#permalink]

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New post 23 Oct 2017, 13:45
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

76% (00:27) correct 24% (00:41) wrong based on 29 sessions

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By what percent is 25 greater than 15?

(A) 10%
(B) 25%
(C) 33 1/3%
(D) 60%
(E) 66 2/3%
[Reveal] Spoiler: OA

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Re: By what percent is 25 greater than 15? [#permalink]

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New post 23 Oct 2017, 14:02
(25-15)/15*100 = 66 2/3%

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By what percent is 25 greater than 15? [#permalink]

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New post 23 Oct 2017, 14:03
nightblade354 wrote:
By what percent is 25 greater than 15?

(A) 10%
(B) 25%
(C) 33 1/3%
(D) 60%
(E) 66 2/3%


Use the following English to algebra translation to write out the requisite equation:

What: x
Percent: ÷ 100
Is: =
Greater Than: -

Therefore: x/100 = (25 - 15)/15

If necessary, cross multiply to solve. Ideally, memorize common fraction to decimal conversions. 10/15 can be reduced to 2/3 and 2/3 = 66.67%.
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Re: By what percent is 25 greater than 15? [#permalink]

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New post 23 Oct 2017, 18:08
\(\frac{(25-15)}{15}\)*100= 66\(\frac{2}{3}\)%

Answer: E.
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Re: By what percent is 25 greater than 15?   [#permalink] 23 Oct 2017, 18:08
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