Solutions by everydaycalculation.com
1st number: 10/15, 2nd number: 1 3/5
1015 - 85 is -1415.
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Related: 20/15-8/5 10/15-16/5 10/30-8/5 10/15-8/10 30/15-8/5 10/15-24/5 10/45-8/5 10/15-8/15 50/15-8/5 10/15-40/5 10/75-8/5 10/15-8/25 70/15-8/5 10/15-56/5 10/15-8/35
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