Solutions by everydaycalculation.com
1st number: 1 9/12, 2nd number: 2 6/12
2112 - 3012 is -34.
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Related: 42/12-30/12 21/12-60/12 21/24-30/12 21/12-30/24 63/12-30/12 21/12-90/12 21/36-30/12 21/12-30/36 21/60-30/12 21/12-30/60 21/84-30/12 21/12-30/84
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