Marci filled her car's gas tank on Monday, and the odometer read 32,461.3 miles. On Friday while the car's odometer read 32,659.7 miles and she filled the car's tank again. It will took 12.4 gallons to fill the tank. How many miles to the gallon does Marci's car get?

Since the tank was full on Monday, whatever it takes to ?ll the tank is the amount of gas in which she has used. Thus, she has used 12.4 gallons of gas. Further, ?nd out the number of miles Marci traveled by subtracting Monday's odometer interpretation from Friday's odometer reading; 32,659.7 - 32,461.3 = 198.4 miles. Divide the miles driven by the gas used to ?nd out the miles per gallon; 198.4 ÷ 12.4 = 16 miles per gallon.