Solutions by everydaycalculation.com
1st number: 8/20, 2nd number: 2 1/12
820 - 2512 is -10160.
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Related: 16/20-25/12 8/20-50/12 8/40-25/12 8/20-25/24 24/20-25/12 8/20-75/12 8/60-25/12 8/20-25/36 40/20-25/12 8/20-25/60 56/20-25/12 8/20-25/84
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