Solutions by everydaycalculation.com
1st number: 1 3/21, 2nd number: 16/21
2421 - 1621 is 821.
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Related: 48/21-16/21 24/21-32/21 24/42-16/21 24/21-16/42 72/21-16/21 24/21-48/21 24/63-16/21 24/21-16/63 24/21-80/21
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