Solutions by everydaycalculation.com
1st number: 1 6/15, 2nd number: 1 13/15
2115 - 2815 is -715.
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Related: 42/15-28/15 21/15-56/15 21/30-28/15 21/15-28/30 63/15-28/15 21/15-84/15 21/45-28/15 21/15-28/45 21/75-28/15 21/15-28/75
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