Gas mileage is the number of miles you can drive on a gallon of gasoline. A test of a new car results in 535 miles on 21 gallons of gas. How far could you drive on 51 gallons of gas ? What is the car's gas mileage?

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We should first find the gas mileage
that will be 535/21 equals to 25.5
The car's gas mileage is 25.5
To find how much the car can drive on 51 gallons of gas
25.5Ɨ51
Equals to 1300.5
the car can drive 1300.5 miles on 51 gallons of gas