Solutions by everydaycalculation.com
1st number: 1/21, 2nd number: 4 0/21
121 - 8421 is -8321.
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Related: 2/21-84/21 1/42-84/21 1/21-84/42 3/21-84/21 1/63-84/21 1/21-84/63 5/21-84/21 7/21-84/21
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