#### Answer

The car will travel 330 miles on 15 gallons.

#### Work Step by Step

Let X represent the distance the car will travel on 15 gallons.
Now, let’s set up a proportion in which one ratio compares the amounts of gasoline and the other ratio compares the corresponding distance the car can travel.
So, $\frac{12}{15}$ = $\frac{264}{X}$
We cross multiply to obtain:
15 $\times$ 264 = 12 $\times$ X
3960 = 12X
Divide both sides by 12
X = 330
The car will travel 330 miles on 15 gallons.