Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 16 1/5
13 - 815 is -23815.
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Related: 2/3-81/5 1/6-81/5 1/3-81/10 1/9-81/5 1/3-81/15 5/3-81/5 1/15-81/5 1/3-81/25 7/3-81/5 1/21-81/5 1/3-81/35
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