22/21 = 1 1/21. The common denominator is 21, so 5/7 = 15/21, and 1/3 = 7/21. Add 15/21 + 7/21 = 22/21. Then change to mixed number.
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two and two sevenths plus six and five sixths is 52.
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The answer is 8/7 [improper fraction]. As a mixed number: 1 1/7 {1 and 1/7}
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