Question

If Calista drove 400 miles and used 20 gallons of gas, her average miles per gallon is how much?

Answer 1

So what you do is divide 400 by 20 to find its average mile per gallon.

Answer 2

So I bet you know whats 400/20 right?

Answer 3

Once you find that value that will be your answer. The amount of miles per gallon.