Pearl drove 90 miles and used 5 gallons of gas. Lourdes used 2 gallons of gas to drive 48 miles.
On average, how many miles did Pearl drive per one gallon of gas? On average, how many miles did Lourdes drive per one gallon of gas? Use unit rates to determine who drove more fuel-efficiently.
Pearl drives 18 Miles with every 1 gallons of gas, Lourdes Drives 24 miles every 1 gallons of gas. Lourdes is using less gas and driving more miles than Pearl every gallon so he is using gas more efficiently.