Solutions by everydaycalculation.com
1st number: 10/12, 2nd number: 1 5/10
1012 - 1510 is -23.
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Related: 20/12-15/10 10/12-30/10 10/24-15/10 10/12-15/20 30/12-15/10 10/12-45/10 10/36-15/10 10/12-15/30 50/12-15/10 10/12-75/10 10/60-15/10 10/12-15/50 70/12-15/10 10/84-15/10 10/12-15/70
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