Solutions by everydaycalculation.com
1st number: 4 0/10, 2nd number: 7 5/10
4010 - 7510 is -72.
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Related: 80/10-75/10 40/20-75/10 40/10-75/20 40/30-75/10 40/10-75/30 40/50-75/10 40/10-75/50 40/70-75/10 40/10-75/70
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