How do you do this please answer fast

Question

charlie and Eden drove 168 miles in three hours they stop to fill the car with 11 gallons of gas they had driven 308 miles using the  previous 11 gallons of gas. How many miles per gallon did there car get. What is the answer and how do you get it does it apply to the next problem 

 

Charlie and Eden's car continues to get the same number of miles per gallon how many gallons of gas will their car use to travel 672 miles 

Answer 1

308 -168 =140 miles    140miles/11gallons = 12.73miles per gallon ( rounded to the nearest hundredth place).

 

This answer applies to the next problem.

 

672miles/ 12.73miles per gallon = 52.79 gallons (rounded to the nearest hundredth place).