Solutions by everydaycalculation.com
1st number: 5 2/8, 2nd number: 2 5/8
428 + 218 is 638.
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Related: 84/8+21/8 42/8+42/8 42/16+21/8 42/8+21/16 42/8+63/8 42/24+21/8 42/8+21/24 42/40+21/8 42/8+21/40 42/56+21/8 42/8+21/56
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