After a storm deposits 120 billion gallons of water into the city reservoir, the reservoir is 85% full. If the original contents of the reservoir totaled 220 billion gallons, the reservoir was approximately what percentage full before the storm?	Answers.
A) 45% B) 48% C) 55% D) 58% E) 65%
When the storm deposited 120 billion gallons, volume of water in the reservoir = 220 + 120= 
<gadget id="calculator">220 + 120</gadget>
<output>340</output>
340 billion gallons   If this is only 85% of the capacity of the reservoir, the total capacity of the reservoir= 340/0.85= 
<gadget id="calculator">340/0.85</gadget>
<output>400</output>
400 billion gallons   Therefore percentage of reservoir that was full before the storm= (220/400)*100= 
<gadget id="calculator">(220/400)*100</gadget>
<output>55</output>
55%   Option 55%
<result>C</result>
After a storm deposits 120 billion gallons of water into the city reservoir, the reservoir is 85% full. If the original contents of the reservoir totaled 220 billion gallons, the reservoir was approximately what percentage full before the storm?