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by GmatKiss » Thu Oct 06, 2011 10:23 am
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 of total
capacity, approximately how many billion gallons of
water were the reservoirs short of total capacity prior
to the storm?

(A) 9
(B) 14
(C) 25
(D) 30
(E) 44
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by gmatclubmember » Thu Oct 06, 2011 10:36 am
If 82% equal to 138 then 100% of the capacity would mean the equivalent of 168 billion gallons.
So initially it was short of 168-124=44billion gallons.

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