Solutions by everydaycalculation.com
1st number: 8/12, 2nd number: 1 4/8
812 - 128 is -56.
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Related: 16/12-12/8 8/12-24/8 8/24-12/8 8/12-12/16 24/12-12/8 8/12-36/8 8/36-12/8 8/12-12/24 40/12-12/8 8/12-60/8 8/60-12/8 8/12-12/40 56/12-12/8 8/12-84/8 8/84-12/8 8/12-12/56
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