#### Answer

$\frac{9}{24}$

#### Work Step by Step

We are trying to write $\frac{3}{8}$ with a denominator of 24. In order to do this, we must first divide 24 by the current denominator.
$24\div8=3$
Therefore, we must multiply both the numerator and denominator of the original fraction by 3.
$\frac{3\times3}{8\times3}=\frac{9}{24}$