Solutions by everydaycalculation.com
1st number: 3/12, 2nd number: 6 8/12
312 - 8012 is -7712.
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Related: 6/12-80/12 3/24-80/12 3/12-80/24 9/12-80/12 3/36-80/12 3/12-80/36 15/12-80/12 3/60-80/12 3/12-80/60 21/12-80/12 3/84-80/12 3/12-80/84
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