Question

Miranda and Jean are planning a trip together. They want to drive, but they're not sure whose car to take. Jean's car uses 5/12 gallons of gasoline to travel 12 1/2 miles. Miranda's car can go 20 5/7 miles on 5/7 gallons of gasoline. Whose car is more fuel efficient, and what is the car’s fuel efficiency in miles per gallon?

Answer 1

Answer:

Jean's car : (12 1/2) / (5/12) = (25/2) / (5/12) = 25/2 * 12/5 = 150/5 = 30 miles per gallon

Miranda's car : (20 5/7) / (5/7) = (145/7) / (5/7) = 145/7 * 7/5 = 145/5 = 29 miles per gallon

most fuel efficient is Jean's car....it gets 30 miles per gallon