Solutions by everydaycalculation.com
1st number: 1/21, 2nd number: 1 7/21
121 - 2821 is -97.
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Related: 2/21-28/21 1/21-56/21 1/42-28/21 1/21-28/42 3/21-28/21 1/21-84/21 1/63-28/21 1/21-28/63 5/21-28/21 7/21-28/21
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