In 1985, 45 percent of a document storage facility's 60 customers were banks, and in 1987, 25 percent of its 144 custome

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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) \(33\frac13\)
E) \(58\frac13\)

Answer: D

Source: Official Guide