Petra bought gasoline when the odometer read 15,345.4. After the next filling, the odometer read 15665.6. It took 13.4 gal to fill the tank.
a) How many miles did she drive?
b) How many miles per gallon (mpg) did the car get?
a) 15665.6 - 15,345.4 = ?
b) Divide the answer to a) by 13.4 to find the mpg.