A car uses 1 1/8 gallons of gas to go 13 1/2
miles. What is the rate of miles per gallon?

Answer:
1 1/8 ga / 13.5 mi = .0833 ga / mi
1 / .0833 ga/mi = 12 mi / ga
or .0833 ga/mi * 13.5 mi = 1.25 ga