Solutions by everydaycalculation.com
1st number: 6/12, 2nd number: 4 0/12
612 - 4812 is -72.
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Related: 6/12-96/12 6/24-48/12 6/12-48/24 18/12-48/12 6/36-48/12 6/12-48/36 30/12-48/12 6/60-48/12 6/12-48/60 42/12-48/12 6/84-48/12 6/12-48/84
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