Solutions by everydaycalculation.com
1st number: 21 1/3, 2nd number: 2 3/6
643 - 156 is 1136.
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Related: 64/3-30/6 64/6-15/6 64/3-15/12 64/3-45/6 64/9-15/6 64/3-15/18 64/3-75/6 64/15-15/6 64/3-15/30 64/21-15/6 64/3-15/42
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