Solutions by everydaycalculation.com
1st number: 1 3/12, 2nd number: 3 6/12
1512 - 4212 is -94.
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Related: 30/12-42/12 15/12-84/12 15/24-42/12 15/12-42/24 45/12-42/12 15/36-42/12 15/12-42/36 75/12-42/12 15/60-42/12 15/12-42/60 15/84-42/12 15/12-42/84
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