Solutions by everydaycalculation.com
1st number: 20/21, 2nd number: 3 17/21
2021 - 8021 is -207.
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Related: 40/21-80/21 20/42-80/21 20/21-80/42 60/21-80/21 20/63-80/21 20/21-80/63
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