Solutions by everydaycalculation.com
1st number: 9/12, 2nd number: 2 0/12
912 - 2412 is -54.
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Related: 18/12-24/12 9/12-48/12 9/24-24/12 27/12-24/12 9/12-72/12 9/36-24/12 9/12-24/36 45/12-24/12 9/60-24/12 9/12-24/60 63/12-24/12 9/84-24/12 9/12-24/84
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