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# In 1985, 45 percent of a document storage facility's 60

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Manager
Joined: 01 Dec 2011
Posts: 67

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In 1985, 45 percent of a document storage facility's 60 [#permalink]

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07 Feb 2012, 02:18
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Question Stats:

82% (01:32) correct 18% (02:01) wrong based on 144 sessions

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In 1985, 45 percent of a document storage facility's 60 customers were banks, and in 1987, 25 percent of its 144 customers were banks. What was the percent increase from 1985 to 1987 in the number of bank customers the facility had?

A) 10.7%
B) 20%
C) 25%
D) $$33 \frac{1}{3}%$$
E) $$58 \frac{1}{3}%$$
[Reveal] Spoiler: OA

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Kudos [?]: 56 [0], given: 12

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Re: In 1985, 45 percent of a document storage facility's 60 [#permalink]

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07 Feb 2012, 02:39
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fiendex wrote:
In 1985, 45 percent of a document storage facility's 60 customers were banks, and in 1987, 25 percent of its 144 customers were banks. What was the percent increase from 1985 to 1987 in the number of bank customers the facility had?

A) 10.7%
B) 20%
C) 25%
D) $$33 \frac{1}{3}%$$
E) $$58 \frac{1}{3}%$$

General formula for percent increase or decrease, (percent change): $$percent=\frac{Change}{Original}*100$$.

Banks in 1985 - 0.45*60=27;
Banks in 1985 - 0.25*144=36;

$$percent=\frac{Change}{Original}*100=\frac{36-27}{27}*1001=\frac{1}{3}*100=33\frac{1}{3}%$$

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Status: Enjoying the GMAT journey....
Joined: 26 Aug 2011
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Re: In 1985, 45 percent of a document storage facility's 60 [#permalink]

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07 Feb 2012, 06:48
Bunuel wrote:
In 1985, 45 percent of a document storage facility's 60 customers were banks, and in 1987, 25 percent of its 144 customers were banks. What was the percent increase from 1985 to 1987 in the number of bank customers the facility had?

No of bank customers in 1985 = 60 x .45 = 27
No of bank customers in 1987 = 144 x .25 = 36
increase in % = 100 X 9/27 = 100/3 or 33 1/3

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Re: In 1985, 45 percent of a document storage facility's 60 [#permalink]

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15 Dec 2017, 05:29
Hello from the GMAT Club BumpBot!

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Re: In 1985, 45 percent of a document storage facility's 60   [#permalink] 15 Dec 2017, 05:29
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