Solutions by everydaycalculation.com
1st number: 8/10, 2nd number: 1 5/20
810 - 2520 is -920.
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Related: 16/10-25/20 8/10-50/20 8/20-25/20 8/10-25/40 24/10-25/20 8/10-75/20 8/30-25/20 8/10-25/60 40/10-25/20 8/50-25/20 56/10-25/20 8/70-25/20
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