请教一道数学题~

fatmoe

a certain car can currently travel 17 miles per gallon of gasoline. after a tune-up, the car will use 80% as much gasoline as it does now. how many miles will the car be able to travel per gallon of gasoline after the tune-up?

A. 13.6
B. 15
C. 20.4
D. 21.25
E. 23.5


有点弄不清楚题目意思...求教大家，感激不尽~

fatmoe

明白了~题目理解错误了....那个per gallon of gasoline......

man855112

选d呀。
耗油量变成原来的80%，距离么就是原来的1.25倍。