Solutions by everydaycalculation.com
1st number: 21 1/3, 2nd number: 3/12
643 - 312 is 25312.
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Related: 64/3-6/12 64/6-3/12 64/3-3/24 64/3-9/12 64/9-3/12 64/3-3/36 64/3-15/12 64/15-3/12 64/3-3/60 64/3-21/12 64/21-3/12 64/3-3/84
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