After a storm deposits 120 billion gallons of water into the city reservoir, the reservoir is 60% full. If the original contents of the reservoir totaled 240 billion gallons, the reservoir was approximately what percentage full before the storm?
Choose one
A) 40%
B) 48%
C) 54%
D) 58%
E) 65%
When the storm deposited 120 billion gallons, volume of water in the reservoir = 240 + 120= 
<gadget id="calculator">240 + 120</gadget>
<output>360</output>
360 billion gallons   If this is only 60% of the capacity of the reservoir, the total capacity of the reservoir= 360/0.6= 
<gadget id="calculator">360/0.6</gadget>
<output>600</output>
600 billion gallons   Therefore percentage of reservoir that was full before the storm= (240/600)*100= 
<gadget id="calculator">(240/600)*100</gadget>
<output>40</output>
40%   Option 54%
<result>C</result>
After a storm deposits 120 billion gallons of water into the city reservoir, the reservoir is 60% full. If the original contents of the reservoir totaled 240 billion gallons, the reservoir was approximately what percentage full before the storm?