Solutions by everydaycalculation.com
1st number: 10/15, 2nd number: 2 8/10
1015 - 2810 is -3215.
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Related: 20/15-28/10 10/15-56/10 10/30-28/10 10/15-28/20 30/15-28/10 10/15-84/10 10/45-28/10 10/15-28/30 50/15-28/10 10/75-28/10 10/15-28/50 70/15-28/10 10/15-28/70
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