Solutions by everydaycalculation.com
1st number: 10/21, 2nd number: 4 0/7
1021 - 287 is -7421.
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Related: 20/21-28/7 10/21-56/7 10/42-28/7 10/21-28/14 30/21-28/7 10/21-84/7 10/63-28/7 10/21-28/21 50/21-28/7 10/21-28/35 70/21-28/7 10/21-28/49
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