There are 13 books on a shelf. 4 of these books are new.
2 answers:
The ratio of used books to new books is 9:4 because 13-4=9 and the ratio of all books to used books is 13:4 because there are 13 total books and 4 used books
Hey there!The ratio is 9:4 <----------- Hope this helps you.
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Step-by-step explanation:
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115.5
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