Solutions by everydaycalculation.com
1st number: 21 1/3, 2nd number: 5/9
643 - 59 is 1879.
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Related: 64/3-10/9 64/6-5/9 64/3-5/18 64/3-15/9 64/9-5/9 64/3-5/27 64/3-25/9 64/15-5/9 64/3-5/45 64/3-35/9 64/21-5/9 64/3-5/63
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