Solutions by everydaycalculation.com
1st number: 7 0/9, 2nd number: 4/9
639 - 49 is 599.
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Related: 63/9-8/9 63/18-4/9 63/9-4/18 63/9-12/9 63/27-4/9 63/9-4/27 63/9-20/9 63/45-4/9 63/9-4/45 63/9-28/9 63/9-4/63
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