Solutions by everydaycalculation.com
1st number: 7 0/9, 2nd number: 2 0/9
639 + 189 is 91.
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Related: 63/9+36/9 63/18+18/9 63/9+54/9 63/27+18/9 63/9+18/27 63/9+90/9 63/45+18/9 63/9+18/45 63/9+18/63
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