Solutions by everydaycalculation.com
1st number: 4/12, 2nd number: 1 3/12
412 - 1512 is -1112.
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Related: 8/12-15/12 4/12-30/12 4/24-15/12 4/12-15/24 4/12-45/12 4/36-15/12 4/12-15/36 20/12-15/12 4/12-75/12 4/60-15/12 4/12-15/60 28/12-15/12 4/84-15/12 4/12-15/84
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