Mathematics, 31.07.2019 04:00 jennifer2129

There are 15 books on a shelf. 9 of these books are new. (a) what is the ratio of new books to used books? (b) what is the ratio of used books to all books?

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There are 15 books on a shelf. 9 of these books are new. (a) what is the ratio of new books to used...

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