Solutions by everydaycalculation.com
1st number: 7 0/9, 2nd number: 4/9
639 + 49 is 679.
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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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