Tristan's car used 3 gallons to travel 102 miles. At what rate does the car use gas, in miles per gallon?

Given:
At 3 gallons, it can travel 102 miles.
Find: At 1 gallon, how many miles?
Solution:
To solve this, we can simply divide 102 mi by 3 gallons.
[tex]\frac{102mi}{3gal}=\frac{34mi}{1\text{ }gal}[/tex]This means the car can travel 34 miles per gallon.