Solutions by everydaycalculation.com
1st number: 21 1/3, 2nd number: 8/9
643 - 89 is 1849.
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Related: 64/3-16/9 64/6-8/9 64/3-8/18 64/3-24/9 64/9-8/9 64/3-8/27 64/3-40/9 64/15-8/9 64/3-8/45 64/3-56/9 64/21-8/9 64/3-8/63
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