Solutions by everydaycalculation.com
1st number: 7 7/8, 2nd number: 4/8
638 + 48 is 678.
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Related: 63/16+4/8 63/8+4/16 63/8+12/8 63/24+4/8 63/8+4/24 63/8+20/8 63/40+4/8 63/8+4/40 63/8+28/8 63/56+4/8 63/8+4/56
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