Number of books purchased for library B increased by what per cent from 2003 to 2006?
A) $ 175\frac{1}{3} $ %
B) $ 172\frac{1}{3} $ %
C) $ 196\frac{2}{3} $ %
D) $ 183\frac{1}{3} $ %
E) $ 194\frac{2}{3} $ %
Correct Answer: D
$ \therefore $ Percentage increase $ =\frac{680-240}{240}\times 100% $ $ =\frac{440}{240}\times 100% $ $ =\frac{550}{3}=183\frac{1}{3}% $