Solutions by everydaycalculation.com
1st number: 3 0/12, 2nd number: 3 6/12
3612 - 4212 is -12.
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Related: 72/12-42/12 36/12-84/12 36/24-42/12 36/12-42/24 36/12-42/36 36/60-42/12 36/12-42/60 36/84-42/12 36/12-42/84
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