The fraction of gasoline used is:
We need to convert this fraction to decimal and to percentage to find the answer.
Converting 7/8 to decimal:
For this we have to do the division between 7 and 8:
Thus, the decimal form of 7/8 is 0.875
Converting 7/8 to percentage:
we use the result that we previously get of 7/8 as a decimal: 0.875, and to convert it to percentage we multiply it by 100:
7/8 to percentage is equal to 87.5%
Answer: 0.875 and 87.5%