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