After a storm deposits 115 billion gallons of water into the city reservoir, the reservoir is 80% full. If the original contents of the reservoir totaled 245 billion gallons, the reservoir was approximately what percentage full before the storm?	Choose the most appropriate option
A) 45%
B) 48%
C) 54%
D) 58%
E) 65%
When the storm deposited 115 billion gallons, volume of water in the reservoir = 245 + 115= 
<gadget id="calculator">245 + 115</gadget>
<output>360</output>
360 billion gallons   If this is only 80% of the capacity of the reservoir, the total capacity of the reservoir= 360/0.8= 
<gadget id="calculator">360/0.8</gadget>
<output>450</output>
450 billion gallons   Therefore percentage of reservoir that was full before the storm= (245/450)*100 = 54.4%   Option 54%
<result>C</result>
After a storm deposits 115 billion gallons of water into the city reservoir, the reservoir is 80% full. If the original contents of the reservoir totaled 245 billion gallons, the reservoir was approximately what percentage full before the storm?