Solutions by everydaycalculation.com
15 - 38 is -740.
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Related: 2/5-3/8 1/5-6/8 1/10-3/8 1/5-3/16 3/5-3/8 1/5-9/8 1/15-3/8 1/5-3/24 1/5-15/8 1/25-3/8 1/5-3/40 7/5-3/8 1/5-21/8 1/35-3/8 1/5-3/56
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