Solutions by everydaycalculation.com
1st number: 1/63, 2nd number: 4 0/7
163 - 287 is -25163.
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Related: 2/63-28/7 1/63-56/7 1/63-28/14 3/63-28/7 1/63-84/7 1/63-28/21 5/63-28/7 1/63-28/35 7/63-28/7 1/63-28/49
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