#### Answer

bottom

#### Work Step by Step

In division, the division sign is 'reversed', and becomes a multiplication sign with the reciprocal of the second fraction.
For example:
$\frac{3}{4}$ $\div$ $\frac{2}{3}$ = $\frac{3}{4}$ $\times$ $\frac{3}{2}$
= $\frac{9}{8}$
Therefore, you should multiply the first fraction by the bottom of the second fraction.