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mestny [16]
4 years ago
15

There are 15 books on a shelf. 6 of these books are new.(

Mathematics
1 answer:
Hunter-Best [27]4 years ago
4 0
<span>The ratio of all books to used books = all books ÷ used books = 15 / (15-6) = 5/3

</span>
<span> The ratio of new books to used books = new books ÷ used books = 6 / 9 = 2/3

</span>
<span> I hope that helps! </span>
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