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Given information
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Capacity = 9 5/8 gallon
Current Level = 4 7/8 gallon
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Given information
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Water needed = 9 5/8 - 4 7/8
Water needed = 8 13/8 - 4 7/8
Water needed = 4 6/8
Water needed = 4 3/4
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Answer: 4 3/4 gallon of water is needed
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