Solutions by everydaycalculation.com
1st number: 8/9, 2nd number: 3 1/21
89 - 6421 is -13663.
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Related: 16/9-64/21 8/18-64/21 8/9-64/42 24/9-64/21 8/27-64/21 8/9-64/63 40/9-64/21 8/45-64/21 56/9-64/21 8/63-64/21
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