Solutions by everydaycalculation.com
1st number: 10/15, 2nd number: 1 6/15
1015 - 2115 is -1115.
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Related: 20/15-21/15 10/15-42/15 10/30-21/15 10/15-21/30 30/15-21/15 10/15-63/15 10/45-21/15 10/15-21/45 50/15-21/15 10/75-21/15 10/15-21/75 70/15-21/15
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