Question 985994
you want the answer in the form "miles per gallon" 


The "per gallon" means "ONE gallon"


Divide both parts of the ratio <font color="blue">50 miles:2.5 gallons</font> by 2.5


50/2.5 = 20
2.5/2.5 = 1


So the ratio <font color="blue">50 miles:2.5 gallons</font> reduces to <font color="blue">20 miles:1 gallon</font>. 



Answer: The unit rate is <font color="red">20 miles per gallon</font>. One gallon of gas will allow you to drive 20 miles.