Solutions by everydaycalculation.com
1st number: 3 4/12, 2nd number: 3/12
4012 - 312 is 3712.
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Related: 80/12-3/12 40/12-6/12 40/24-3/12 40/12-3/24 40/12-9/12 40/36-3/12 40/12-3/36 40/12-15/12 40/60-3/12 40/12-3/60 40/12-21/12 40/84-3/12 40/12-3/84
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