Solutions by everydaycalculation.com
1st number: 7/10, 2nd number: 1 5/10
710 - 1510 is -45.
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Related: 14/10-15/10 7/10-30/10 7/20-15/10 7/10-15/20 21/10-15/10 7/10-45/10 7/30-15/10 7/10-15/30 35/10-15/10 7/10-75/10 7/50-15/10 7/10-15/50 49/10-15/10 7/70-15/10 7/10-15/70
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