Question

The gas tank if your car is 40%, there are 8 gallons of gas in the tank, what is the capacity of the gas tank?

Answer 1

The car holds 20 gallons of gas. 
40%=8
20%=1/2 of 40%
4=1/2 of 8
so 40+40+20=100
8+8+4=20
100%=20 gallons

Answer 2

40 divided by 8 is 5. Each gallon equals five percent. There are twenty fragments of five percent in 100 percent. The answer is 20 gallons.