Solutions by everydaycalculation.com
1st number: 5 0/4, 2nd number: 3 3/8
204 + 278 is 678.
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Related: 40/4+27/8 20/4+54/8 20/8+27/8 20/4+27/16 60/4+27/8 20/4+81/8 20/12+27/8 20/4+27/24 20/4+27/40 20/28+27/8 20/4+27/56
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