Solutions by everydaycalculation.com
1st number: 10/18, 2nd number: 1 2/6
1018 - 86 is -79.
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Related: 20/18-8/6 10/18-16/6 10/36-8/6 10/18-8/12 30/18-8/6 10/18-24/6 10/54-8/6 10/18-8/18 50/18-8/6 10/18-40/6 10/90-8/6 10/18-8/30 70/18-8/6 10/18-56/6 10/18-8/42
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