Solutions by everydaycalculation.com
1st number: 8/18, 2nd number: 1 4/12
818 - 1612 is -89.
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Related: 16/18-16/12 8/18-32/12 8/36-16/12 8/18-16/24 24/18-16/12 8/18-48/12 8/54-16/12 8/18-16/36 40/18-16/12 8/18-80/12 8/90-16/12 8/18-16/60 56/18-16/12 8/18-16/84
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