## Basic College Mathematics (10th Edition)

$\frac{5}{6}$
$3\frac{1}{2}$ - $2\frac{2}{3}$ = $\frac{7}{2}$ - $\frac{8}{3}$ = $\frac{21}{6}$ - $\frac{16}{6}$ = $\frac{5}{6}$