Using Rates to Determine Efficiency

Comparing Fuel Efficiency

Work Time

Comparing Fuel Efficiency

Denzel’s mom’s car can travel 450 miles using 20 gallons of gas. You know that the fuel efficiency of Jason’s dad’s car is about 20 miles per gallon.

  • Which car is more fuel efficient? Defend your answer.


  • What are the quantities in the problem?
  • How can you express the fuel efficiency of Denzel’s mom’s car in miles per gallon?
  • How can you compare the two rates?