1. The problem is to rearrange the formula $F = ma$ to solve for $m$. 2. The formula given is $F = ma$, where $F$ is force, $m$ is mass, and $a$ is acceleration. 3. To isolate $m$, divide both sides of the equation by $a$ (assuming $a \neq 0$): $$m = \frac{F}{a}$$ 4. Using the cancellation notation for clarity: $$m = \frac{F}{\cancel{a}} \times \frac{\cancel{a}}{a} = \frac{F}{a}$$ 5. Therefore, the rearranged formula with $m$ as the subject is: $$m = \frac{F}{a}$$ This means mass equals force divided by acceleration.