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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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23 Oct 2017, 13:45
2
00:00

Difficulty:

5% (low)

Question Stats:

90% (00:44) correct 10% (01:08) wrong based on 70 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%

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

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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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23 Oct 2017, 14:03
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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23 Oct 2017, 18:08
$$\frac{(25-15)}{15}$$*100= 66$$\frac{2}{3}$$%

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

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21 Jan 2019, 17:46
By what percent is 25 greater than 15?

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

We can create the following expression:

(25 - 15)/15 x 100 = 10/15 x 100 = 2/3 x 100 = 66 ⅔%

Alternate Solution:

We see that 25 is 10 more than 15. Thus, 25 is 10/15 greater than 15. We see that 10/15 = 2/3 ≈ 0.67, or 67%

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Re: By what percent is 25 greater than 15?   [#permalink] 21 Jan 2019, 17:46
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