#### Answer

$m=-10.92$

#### Work Step by Step

We are given the equation $\frac{m}{-5.2}=2.1$. In order to solve, we must first rewrite the left side as $-\frac{1}{5.2}m$.
Multiply both sides by -5.2.
$(-\frac{1}{5.2}m\times-5.2)=m=2.1\times-5.2=-10.92$
Therefore, $m=-10.92$.