Solutions by everydaycalculation.com
1st number: 3/10, 2nd number: 21 1/3
310 - 643 is -63130.
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Related: 6/10-64/3 3/20-64/3 3/10-64/6 9/10-64/3 3/30-64/3 3/10-64/9 15/10-64/3 3/50-64/3 3/10-64/15 21/10-64/3 3/70-64/3 3/10-64/21
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