Angelo family drove 254.6 miles their car used 19 gallons of gasoline describe the cars gas mileage

The gas mileage is usually expressed in terms of the ratio of the distance traveled of the vehicle to the amount of fuel used up. This is the basis of how far a vehicle could go according to its consumption of fuel. In this case, the gas mileage is:

Gas mileage = 254.6 miles/19 gallons
Gas mileage = 13.4 miles/gal