Solutions by everydaycalculation.com
1st number: 7 0/4, 2nd number: 10 2/4
284 - 424 is -72.
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Related: 56/4-42/4 28/4-84/4 28/8-42/4 28/4-42/8 84/4-42/4 28/12-42/4 28/4-42/12 28/20-42/4 28/4-42/20 28/4-42/28
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