Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 12 4/5
13 - 645 is -18715.
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Related: 2/3-64/5 1/6-64/5 1/3-64/10 1/9-64/5 1/3-64/15 5/3-64/5 1/15-64/5 1/3-64/25 7/3-64/5 1/21-64/5 1/3-64/35
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