Solutions by everydaycalculation.com
1st number: 1 3/12, 2nd number: 3 9/12
1512 - 4512 is -52.
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Related: 30/12-45/12 15/12-90/12 15/24-45/12 15/12-45/24 45/12-45/12 15/36-45/12 15/12-45/36 75/12-45/12 15/60-45/12 15/12-45/60 15/84-45/12 15/12-45/84
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