Answer
$$M = \frac{P}{C} - 1$$
Work Step by Step
To solve this equation for $M$, we must isolate $M$.
First, we subtract $C$ from each side:
$$P - C = MC$$
Then, we divide the equation by $C$ to isolate $M$:
$$M = \frac{P - C}{C}$$
Now, we can simplify the equation. To work more easily with the fraction, we can separate the fraction into two:
$$M = \frac{P}{C} - \frac{C}{C}$$
We can now simplify:
$$M = \frac{P}{C} - 1$$