## Basic College Mathematics (10th Edition)

$\frac{73}{90} = \frac{unknown}{100}$ Part = 73 Whole = 90 Percentage = unknown
$\frac{Part}{Whole} = \frac{Percent}{100}$ Now 73 DVDs is what %age of 90 DVDs? i.e. $\frac{73}{90} = \frac{unknown}{100}$