Question

A boat travels 32 miles on 4 gallons of fuel. How many miles per half gallon is that?

Answer 1

That would be 4 miles per half gallon.

If you do the math, 32/4 = 8. So, 1 gallon = 8. 
8 * (1/2) = 4. SO it is 4.

Hope that helps.

Answer 2

32 divided by 4 is 8. so 8 miles per gallon.