Solutions by everydaycalculation.com
1st number: 10/15, 2nd number: 2 0/15
1015 - 3015 is -43.
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Related: 20/15-30/15 10/15-60/15 10/30-30/15 30/15-30/15 10/15-90/15 10/45-30/15 10/15-30/45 50/15-30/15 10/75-30/15 10/15-30/75 70/15-30/15
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