Solutions by everydaycalculation.com
1st number: 3 6/12, 2nd number: 7 6/12
4212 - 9012 is -41.
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Related: 84/12-90/12 42/24-90/12 42/12-90/24 42/36-90/12 42/12-90/36 42/60-90/12 42/12-90/60 42/84-90/12 42/12-90/84
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