Solutions by everydaycalculation.com
1st number: 8/21, 2nd number: 2 12/21
821 - 5421 is -4621.
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Related: 16/21-54/21 8/42-54/21 8/21-54/42 24/21-54/21 8/63-54/21 8/21-54/63 40/21-54/21 56/21-54/21
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