Solutions by everydaycalculation.com
1st number: 3 9/12, 2nd number: 9/12
4512 - 912 is 31.
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Related: 90/12-9/12 45/12-18/12 45/24-9/12 45/12-9/24 45/12-27/12 45/36-9/12 45/12-9/36 45/12-45/12 45/60-9/12 45/12-9/60 45/12-63/12 45/84-9/12 45/12-9/84
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