johns car uses 6.4 gallons of gas for every 100 miles he drives how much gas will he need for a trip of 75 miles

Question

johns car uses 6.4 gallons of gas for every 100 miles he drives how much gas will he need for a trip of 75 miles

Answer 1

If John's car uses 6.4 gallons of gas for every 100 miles, then then amount it uses per mile is given by:

6.4 gallons/100 miles = 0.064 gallons/mile

 

The amount that he will need for 75 miles = amount needed per mile x total miles = 0.064 gallons/mile x 75 miles = 4.8 gallons