Solutions by everydaycalculation.com
1st number: 8/15, 2nd number: 9 1/7
815 - 647 is -904105.
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Related: 16/15-64/7 8/30-64/7 8/15-64/14 24/15-64/7 8/45-64/7 8/15-64/21 40/15-64/7 8/75-64/7 8/15-64/35 56/15-64/7 8/15-64/49
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