#### Answer

72

#### Work Step by Step

In order to rewrite $\frac{9}{7}$ with a denominator of 56, we must first divide 56 by the original denominator.
$56÷7=8$
Therefore, we must multiply the original numerator by 8.
$\frac{9}{7}=\frac{9\times8}{56}=\frac{72}{56}$