Solutions by everydaycalculation.com
1st number: 3 3/8, 2nd number: 3 4/8
278 - 288 is -18.
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Related: 54/8-28/8 27/8-56/8 27/16-28/8 27/8-28/16 81/8-28/8 27/8-84/8 27/24-28/8 27/8-28/24 27/40-28/8 27/8-28/40 27/56-28/8 27/8-28/56
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