Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 3 9/21
421 - 7221 is -6821.
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Related: 8/21-72/21 4/42-72/21 4/21-72/42 12/21-72/21 4/63-72/21 4/21-72/63 20/21-72/21 28/21-72/21
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