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19 October, 17:52

There are 13 books on a shelf. 8 of these books are new.

(a) What is the ratio of all books to used books?

(b) What is the ratio of used books to new books?

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Answers (2)
  1. 19 October, 19:38
    0
    13-8 = 5 so 8 new, 5 used

    A. all to used 13:5

    B. used to new 5:8
  2. 19 October, 20:46
    0
    Well we can find out how many used books there are by subtracting 8 from 13 which gives us 5. Then we put that in a ratio for all to used it would be 13:5 or 13/5

    Used to new would be 5:8 or 5/8
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