Solutions by everydaycalculation.com
1st number: 3/12, 2nd number: 2 4/12
312 - 2812 is -2512.
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Related: 6/12-28/12 3/12-56/12 3/24-28/12 3/12-28/24 9/12-28/12 3/12-84/12 3/36-28/12 3/12-28/36 15/12-28/12 3/60-28/12 3/12-28/60 21/12-28/12 3/84-28/12 3/12-28/84
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