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If 70 percent of x is equal to 50 percent of y, then y is what percent

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If 70 percent of x is equal to 50 percent of y, then y is what percent  [#permalink]

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New post 27 Oct 2016, 08:26
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If 70 percent of x is equal to 50 percent of y, then y is what percent of x?

A. 20%

B. 71%

C. 75%

D. 120%

E. 140%
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Re: If 70 percent of x is equal to 50 percent of y, then y is what percent  [#permalink]

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New post 27 Oct 2016, 09:29
rishit1080 wrote:
If 70 percent of x is equal to 50 percent of y, then y is what percent of x?

A. 20%

B. 71%

C. 75%

D. 120%

E. 140%


7x/10 = 5y/10 = 35

So, x = 50 ad y = 70

Y as % of x = 70/50*100 => 140

Hence answer will be (E) 140%
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Re: If 70 percent of x is equal to 50 percent of y, then y is what percent  [#permalink]

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New post 17 May 2017, 04:52
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If 70 percent of x is equal to 50 percent of y, then y is what percent of x?

70% of x = 50% of y
\(\frac{70}{100}\) * x = \(\frac{50}{100}\) * y
y = \(\frac{70}{100}\) * \(\frac{100}{50}\) * x = \(\frac{7}{5}\)x
y percent of x = \(\frac{7}{5}\) x 100 = 140%
Answer E...

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Re: If 70 percent of x is equal to 50 percent of y, then y is what percent  [#permalink]

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New post 19 May 2017, 06:28
rishit1080 wrote:
If 70 percent of x is equal to 50 percent of y, then y is what percent of x?

A. 20%

B. 71%

C. 75%

D. 120%

E. 140%


We need to determine the value of (y/x)(100). We are given that 70 percent of x is equal to 50 percent of y; thus:

0.7x = 0.5y

7x = 5y

7/5 = y/x

Thus, y as a percentage of x is:

(y/x)(100) = (7/5)(100) = 140

Answer: E
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Re: If 70 percent of x is equal to 50 percent of y, then y is what percent  [#permalink]

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New post 25 May 2017, 23:09
70/100 * x = 50/100 * y
Or 7x = 5y Or y/x = 7/5 = 1.4

Thus y is what % of x = y/x * 100 = 1.4*100 = 140%

Answer is E
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Re: If 70 percent of x is equal to 50 percent of y, then y is what percent  [#permalink]

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New post 06 Dec 2018, 13:09
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Re: If 70 percent of x is equal to 50 percent of y, then y is what percent   [#permalink] 06 Dec 2018, 13:09
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