Solutions by everydaycalculation.com
1st number: 10/12, 2nd number: 1 9/12
1012 - 2112 is -1112.
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Related: 20/12-21/12 10/12-42/12 10/24-21/12 10/12-21/24 30/12-21/12 10/12-63/12 10/36-21/12 10/12-21/36 50/12-21/12 10/60-21/12 10/12-21/60 70/12-21/12 10/84-21/12 10/12-21/84
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