Answer
$21\frac{\text{ employees}}{\text{ fax lines}}$
Work Step by Step
63 employees to 3 fax lines --> $\frac{63\text{ employees}}{3\text{ fax lines}}=\frac{63\text{ employees}\div3}{3\text{ fax lines}\div3} = 21\frac{\text{ employees}}{\text{ fax lines}}$
