Solutions by everydaycalculation.com
1st number: 8/12, 2nd number: 1 6/12
812 - 1812 is -56.
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Related: 16/12-18/12 8/12-36/12 8/24-18/12 8/12-18/24 24/12-18/12 8/12-54/12 8/36-18/12 8/12-18/36 40/12-18/12 8/12-90/12 8/60-18/12 8/12-18/60 56/12-18/12 8/84-18/12 8/12-18/84
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