Solutions by everydaycalculation.com
1st number: 10/15, 2nd number: 1 5/15
1015 - 2015 is -23.
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Related: 20/15-20/15 10/15-40/15 10/30-20/15 10/15-20/30 30/15-20/15 10/15-60/15 10/45-20/15 10/15-20/45 50/15-20/15 10/75-20/15 10/15-20/75 70/15-20/15
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