Solutions by everydaycalculation.com
1st number: 9/12, 2nd number: 1 6/12
912 - 1812 is -34.
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Related: 18/12-18/12 9/12-36/12 9/24-18/12 9/12-18/24 27/12-18/12 9/12-54/12 9/36-18/12 9/12-18/36 45/12-18/12 9/12-90/12 9/60-18/12 9/12-18/60 63/12-18/12 9/84-18/12 9/12-18/84
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