Solutions by everydaycalculation.com
1st number: 10/12, 2nd number: 1 3/18
1012 - 2118 is -13.
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Related: 20/12-21/18 10/12-42/18 10/24-21/18 10/12-21/36 30/12-21/18 10/12-63/18 10/36-21/18 10/12-21/54 50/12-21/18 10/60-21/18 10/12-21/90 70/12-21/18 10/84-21/18
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