Solutions by everydaycalculation.com
1st number: 2/21, 2nd number: 1 3/21
221 - 2421 is -2221.
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Related: 4/21-24/21 2/21-48/21 2/42-24/21 2/21-24/42 6/21-24/21 2/21-72/21 2/63-24/21 2/21-24/63 10/21-24/21 14/21-24/21
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