Solutions by everydaycalculation.com
1st number: 12/21, 2nd number: 1 11/21
1221 - 3221 is -2021.
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Related: 24/21-32/21 12/21-64/21 12/42-32/21 12/21-32/42 36/21-32/21 12/21-96/21 12/63-32/21 12/21-32/63 60/21-32/21 84/21-32/21
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