By approximately what percent did the sale of nonfiction

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AAPL: Moderator; Posts: 2632; Joined: Sun Oct 29, 2017 2:08 pmFollowed by: 2 members

by AAPL » Thu May 24, 2018 5:39 am

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By approximately what percent did the sale of nonfiction titles increase from 1984 to 1987?

A. 42%
B. 50%
C. 70%
D. 90%
E. 110%

The OA is A

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Source: Beat The GMAT — Problem Solving | Thu May 24, 2018 5:39 am

GMATGuruNY: GMAT Instructor; Posts: 15539; Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members; Location: New York, NY; Thanked: 13060 times; GMAT Score:790

by GMATGuruNY » Thu May 24, 2018 7:45 am

AAPL wrote:

By approximately what percent did the sale of nonfiction titles increase from 1984 to 1987?

A. 42%
B. 50%
C. 70%
D. 90%
E. 110%

According to the undashed line on the chart:
Nonfiction in 1984 = 40%.
Nonfiction in 1987 â‰ˆ 58%.
Thus:
Percent increase from 40 to 58 = (difference/original) * 100 = (18/40) * 100 = 45%.

The correct answer is A.

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Scott@TargetTestPrep: GMAT Instructor; Posts: 8136; Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members; Location: Los Angeles, CA; Thanked: 43 times

by Scott@TargetTestPrep » Tue May 29, 2018 6:39 am

AAPL wrote:

By approximately what percent did the sale of nonfiction titles increase from 1984 to 1987?

A. 42%
B. 50%
C. 70%
D. 90%
E. 110%

The sales figure of nonfiction titles is 40 thousand books in 1984 and approximately 57 thousand books in 1987.

The percent increase is:

(57 - 40)/40 x 100

17/40 x 100 = 1700/40 = 170/4 = 42.5 percent

Answer: A

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