Solutions by everydaycalculation.com
1st number: 1 19/21, 2nd number: 16/21
4021 - 1621 is 87.
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Related: 80/21-16/21 40/21-32/21 40/42-16/21 40/21-16/42 40/21-48/21 40/63-16/21 40/21-16/63 40/21-80/21
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