Solutions by everydaycalculation.com
1st number: 21 1/3, 2nd number: 7/9
643 - 79 is 1859.
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Related: 64/3-14/9 64/6-7/9 64/3-7/18 64/3-21/9 64/9-7/9 64/3-7/27 64/3-35/9 64/15-7/9 64/3-7/45 64/3-49/9 64/21-7/9 64/3-7/63
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