Question

Your car can go 310 miles on 20 gallons of gas. What is your car's gas mileage? How far could you drive on 55 gallons of gas?

Answer 1

Your car's gas mileage is 15.5 miles to the gallon. On 55 miles of gas, you could drive 852.5 miles. 

Answer 2

20 gallons = 310 miles

1 gallon = 310 ÷ 20 = 15.5 miles

55 gallons = 15.5 x 55 = 852.5 miles

Answer: 852.5 miles