Solutions by everydaycalculation.com
1st number: 3 6/12, 2nd number: 4 0/12
4212 - 4812 is -12.
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Related: 84/12-48/12 42/12-96/12 42/24-48/12 42/12-48/24 42/36-48/12 42/12-48/36 42/60-48/12 42/12-48/60 42/84-48/12 42/12-48/84
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