Solutions by everydaycalculation.com
1st number: 12/15, 2nd number: 1 2/5
1215 - 75 is -35.
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Related: 24/15-7/5 12/15-14/5 12/30-7/5 12/15-7/10 36/15-7/5 12/15-21/5 12/45-7/5 12/15-7/15 60/15-7/5 12/15-35/5 12/75-7/5 12/15-7/25 84/15-7/5 12/15-49/5 12/15-7/35
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