Solutions by everydaycalculation.com
1st number: 7 0/9, 2nd number: 5/9
639 + 59 is 689.
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Related: 63/9+10/9 63/18+5/9 63/9+5/18 63/9+15/9 63/27+5/9 63/9+5/27 63/9+25/9 63/45+5/9 63/9+5/45 63/9+35/9 63/9+5/63
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