Solutions by everydaycalculation.com
1st number: 1 7/21, 2nd number: 5/7
2821 - 57 is 1321.
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Related: 56/21-5/7 28/21-10/7 28/42-5/7 28/21-5/14 84/21-5/7 28/21-15/7 28/63-5/7 28/21-5/21 28/21-25/7 28/21-5/35 28/21-35/7 28/21-5/49
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