A drought decreased the amount of water stored in State J reservoirs from 200 billion gallons to 150 billion gallons. If the drought decreased the amount of water in the reservoirs to 30 percent of total capacity, approximately how many billion gallons of water were the reservoirs short of total capacity prior to the rain? Choose the correct option.
A) 340
B) 304
C) 352
D) 300
E) 350
After the reservoir is filled to 150 gallons the amount of water is at 30% - which means that 70% of the reservoir is empty. To figure out what that 70% is : 150 gallons /30 percent = x gallons /70 percent , therefore, x = 350 gallons , answer choices A,B,E,D are below 350 . We know that the reservoir must be short more than 350 gallons, therefore, the only possible choice is 352.
<result>C</result>
A drought decreased the amount of water stored in State J reservoirs from 200 billion gallons to 150 billion gallons. If the drought decreased the amount of water in the reservoirs to 30 percent of total capacity, approximately how many billion gallons of water were the reservoirs short of total capacity prior to the rain?