Solutions by everydaycalculation.com
1st number: 2 3/21, 2nd number: 1 4/21
4521 - 2521 is 2021.
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Related: 90/21-25/21 45/21-50/21 45/42-25/21 45/21-25/42 45/21-75/21 45/63-25/21 45/21-25/63
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