Solutions by everydaycalculation.com
1st number: 2/8, 2nd number: 5 2/8
28 - 428 is -51.
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Related: 4/8-42/8 2/8-84/8 2/16-42/8 2/8-42/16 6/8-42/8 2/24-42/8 2/8-42/24 10/8-42/8 2/40-42/8 2/8-42/40 14/8-42/8 2/56-42/8 2/8-42/56
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