Solutions by everydaycalculation.com
1st number: 3 9/12, 2nd number: 4 1/12
4512 - 4912 is -13.
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Related: 90/12-49/12 45/12-98/12 45/24-49/12 45/12-49/24 45/36-49/12 45/12-49/36 45/60-49/12 45/12-49/60 45/84-49/12 45/12-49/84
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