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30 September, 21:29

Ms. Bauer corrected 2⁄3 of the science quizzes. Mr. Richardson corrected 2⁄7 of the quizzes. What fraction of the science quizzes has been corrected?

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  1. 30 September, 21:33
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    We must add 2/3 and 2/7.

    We have to convert these to fractions with "21" as the denominator.

    14/21 plus 6/21 =

    20/21 of the quizzes have been corrected.
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