Solutions by everydaycalculation.com
1st number: 3/12, 2nd number: 2 6/12
312 - 3012 is -94.
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Related: 6/12-30/12 3/12-60/12 3/24-30/12 3/12-30/24 9/12-30/12 3/12-90/12 3/36-30/12 3/12-30/36 15/12-30/12 3/60-30/12 3/12-30/60 21/12-30/12 3/84-30/12 3/12-30/84
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