Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 1 3/21
421 - 2421 is -2021.
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Related: 8/21-24/21 4/21-48/21 4/42-24/21 4/21-24/42 12/21-24/21 4/21-72/21 4/63-24/21 4/21-24/63 20/21-24/21 28/21-24/21
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