Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 2 12/21
421 - 5421 is -5021.
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Related: 8/21-54/21 4/42-54/21 4/21-54/42 12/21-54/21 4/63-54/21 4/21-54/63 20/21-54/21 28/21-54/21
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