Solutions by everydaycalculation.com
1st number: 9/10, 2nd number: 9 1/7
910 - 647 is -57770.
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Related: 18/10-64/7 9/20-64/7 9/10-64/14 27/10-64/7 9/30-64/7 9/10-64/21 45/10-64/7 9/50-64/7 9/10-64/35 63/10-64/7 9/70-64/7 9/10-64/49
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