Solutions by everydaycalculation.com
1st number: 7/10, 2nd number: 7 5/10
710 - 7510 is -345.
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Related: 14/10-75/10 7/20-75/10 7/10-75/20 21/10-75/10 7/30-75/10 7/10-75/30 35/10-75/10 7/50-75/10 7/10-75/50 49/10-75/10 7/70-75/10 7/10-75/70
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