Solutions by everydaycalculation.com
1st number: 2 6/12, 2nd number: 3 6/12
3012 - 4212 is -11.
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Related: 60/12-42/12 30/12-84/12 30/24-42/12 30/12-42/24 90/12-42/12 30/36-42/12 30/12-42/36 30/60-42/12 30/12-42/60 30/84-42/12 30/12-42/84
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