Question

Dave can drive 160 miles on a tank of gas. Approximately how many tanks of gas will he need to drive 880 miles?

Answer 1

How many times does he have to drive 160 miles in order to cover 880 ?

880/160 = 5.5 times

He'll need  5 complete tanks of gas, and 1/2 of another one.

Answer 2

$160\ miles\ \rightarrow\ \ 1\ tank\ of\ gas\\880\ miles\ \rightarrow\ x\\\\160\cdot x=880\ /:160\\\\x= \frac{880}{160} \ \ \ \Rightarrow\ \ x= \frac{11}{2} \ \ \ \Rightarrow\ \ x= 5.5\\\\Ans.\ 5.5\ tank\ of\ gas$