Answer:
21 Miles per Gallon
Explanation:
I assume you just have to change it into equal/equivalent fractions

For the divison fraction, divide both the numerator and denominator by 1/3
 , this equals to around
, this equals to around 
 (This'll make sense in a bit)
 (This'll make sense in a bit)
For the multiplication problem, Multiply both the numerator and denominator by 3
 , this also equals to around
, this also equals to around 

Since both the division and multiplication both totaled to 

 
 
= 21 miles per gallon
Hope this helps!