Solutions by everydaycalculation.com
1st number: 5/10, 2nd number: 7 5/10
510 - 7510 is -71.
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Related: 5/20-75/10 5/10-75/20 15/10-75/10 5/30-75/10 5/10-75/30 25/10-75/10 5/50-75/10 5/10-75/50 35/10-75/10 5/70-75/10 5/10-75/70
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