Solutions by everydaycalculation.com
1st number: 7/20, 2nd number: 6 3/7
720 - 457 is -851140.
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Related: 14/20-45/7 7/20-90/7 7/40-45/7 7/20-45/14 21/20-45/7 7/60-45/7 7/20-45/21 35/20-45/7 7/20-45/35 49/20-45/7 7/20-45/49
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