Task: Question Answering
Input (English): Problem: 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 ?
Options: a. 45 %, b. 48 %, c. 55 %, d. 58 %, e. 65 %
Output (English): c