Solutions by everydaycalculation.com
1st number: 8/21, 2nd number: 1 3/21
821 - 2421 is -1621.
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Related: 16/21-24/21 8/21-48/21 8/42-24/21 8/21-24/42 24/21-24/21 8/21-72/21 8/63-24/21 8/21-24/63 40/21-24/21 56/21-24/21
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