Solutions by everydaycalculation.com
1st number: 12/15, 2nd number: 3 4/15
1215 - 4915 is -3715.
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Related: 24/15-49/15 12/15-98/15 12/30-49/15 12/15-49/30 36/15-49/15 12/45-49/15 12/15-49/45 60/15-49/15 12/75-49/15 12/15-49/75 84/15-49/15
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