Solutions by everydaycalculation.com
1st number: 12/15, 2nd number: 4 1/12
1215 - 4912 is -19760.
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Related: 24/15-49/12 12/15-98/12 12/30-49/12 12/15-49/24 36/15-49/12 12/45-49/12 12/15-49/36 60/15-49/12 12/75-49/12 12/15-49/60 84/15-49/12 12/15-49/84
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