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? Choose the correct choice from the following answers:
A) 10.7%  B) 20%  C) 25%  D) 33 1/3  E) 58 1/3
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   33 1/3 is the correct answer
<result>D</result>
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?