Solutions by everydaycalculation.com
310 - 15 is 110.
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Related: 6/10-1/5 3/10-2/5 3/20-1/5 3/10-1/10 9/10-1/5 3/10-3/5 3/30-1/5 3/10-1/15 15/10-1/5 3/50-1/5 3/10-1/25 21/10-1/5 3/10-7/5 3/70-1/5 3/10-1/35
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