Solutions by everydaycalculation.com
1st number: 7/9, 2nd number: 1 3/5
79 - 85 is -3745.
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Related: 14/9-8/5 7/9-16/5 7/18-8/5 7/9-8/10 21/9-8/5 7/9-24/5 7/27-8/5 7/9-8/15 35/9-8/5 7/9-40/5 7/45-8/5 7/9-8/25 49/9-8/5 7/9-56/5 7/63-8/5 7/9-8/35
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