Solutions by everydaycalculation.com
1st number: 8/21, 2nd number: 1 6/21
821 - 2721 is -1921.
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Related: 16/21-27/21 8/21-54/21 8/42-27/21 8/21-27/42 24/21-27/21 8/21-81/21 8/63-27/21 8/21-27/63 40/21-27/21 56/21-27/21
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