Solutions by everydaycalculation.com
1st number: 1 3/12, 2nd number: 2 6/12
1512 - 3012 is -54.
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Related: 30/12-30/12 15/12-60/12 15/24-30/12 15/12-30/24 45/12-30/12 15/12-90/12 15/36-30/12 15/12-30/36 75/12-30/12 15/60-30/12 15/12-30/60 15/84-30/12 15/12-30/84
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