Solutions by everydaycalculation.com
1st number: 1 9/21, 2nd number: 1 4/21
3021 - 2521 is 521.
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Related: 60/21-25/21 30/21-50/21 30/42-25/21 30/21-25/42 90/21-25/21 30/21-75/21 30/63-25/21 30/21-25/63
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