Solutions by everydaycalculation.com
1st number: 3 6/12, 2nd number: 7/12
4212 - 712 is 3512.
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Related: 84/12-7/12 42/12-14/12 42/24-7/12 42/12-7/24 42/12-21/12 42/36-7/12 42/12-7/36 42/12-35/12 42/60-7/12 42/12-7/60 42/12-49/12 42/84-7/12 42/12-7/84
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