Solutions by everydaycalculation.com
1st number: 1 9/21, 2nd number: 5/21
3021 - 521 is 2521.
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Related: 60/21-5/21 30/21-10/21 30/42-5/21 30/21-5/42 90/21-5/21 30/21-15/21 30/63-5/21 30/21-5/63 30/21-25/21 30/21-35/21
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