Solutions by everydaycalculation.com
1st number: 8/12, 2nd number: 1 3/15
812 - 1815 is -815.
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Related: 16/12-18/15 8/12-36/15 8/24-18/15 8/12-18/30 24/12-18/15 8/12-54/15 8/36-18/15 8/12-18/45 40/12-18/15 8/12-90/15 8/60-18/15 8/12-18/75 56/12-18/15 8/84-18/15
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