Solutions by everydaycalculation.com
1st number: 8/12, 2nd number: 3 6/12
812 - 4212 is -176.
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Related: 16/12-42/12 8/12-84/12 8/24-42/12 8/12-42/24 24/12-42/12 8/36-42/12 8/12-42/36 40/12-42/12 8/60-42/12 8/12-42/60 56/12-42/12 8/84-42/12 8/12-42/84
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