Solutions by everydaycalculation.com
1st number: 6/60, 2nd number: 2 1/12
660 - 2512 is -11960.
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Related: 12/60-25/12 6/60-50/12 6/60-25/24 18/60-25/12 6/60-75/12 6/60-25/36 30/60-25/12 6/60-25/60 42/60-25/12 6/60-25/84
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