Solutions by everydaycalculation.com
1st number: 7 0/9, 2nd number: 8/9
639 - 89 is 559.
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Related: 63/9-16/9 63/18-8/9 63/9-8/18 63/9-24/9 63/27-8/9 63/9-8/27 63/9-40/9 63/45-8/9 63/9-8/45 63/9-56/9 63/9-8/63
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