A rainstorm increased the amount of water stored in State J reservoirs from 124 billion gallons to 138 billion gallons. If the storm increased the amount of water in the reservoirs to 82 percent if total capacity, approximately how many billion gallons of water were the reservoirs short of total capacity prior tu the storm?

A 9

B 14

C 25

D 30

E 44

我认为是138*0.18=25，但答案是44。

求助各位！！！谢谢！！！

假设 total capacity=X, 则 138=82% X, X=168

168-124=44

看清楚题意应该就不难