Solutions by everydaycalculation.com
1st number: 3/12, 2nd number: 2 11/12
312 - 3512 is -83.
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Related: 6/12-35/12 3/12-70/12 3/24-35/12 3/12-35/24 9/12-35/12 3/36-35/12 3/12-35/36 15/12-35/12 3/60-35/12 3/12-35/60 21/12-35/12 3/84-35/12 3/12-35/84
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