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A shelf at a bookstore displays 27 books. Of these 27 books, 9 of the books are nonfiction books. The store owner adds 6 new fiction books to the shelf and wants the ratio of fiction books to nonfiction books to stay the same . What is the total number of nonfiction books that the store should display, after the new fiction books are added?

Sagot :

The owner should add 3 more nonfiction books in order to keep the ratio of 2 fiction books, to 1 nonfiction books. Would leave a total of 12 nonfiction and 24 fiction, and a total of 36 books.

Hope this helps.
IGreenidn
27 - 9 = 18

So there are 9 nonfiction books and 18 fiction books.

6 + 18 = 24

Set up a proportion:

9/18 = x/24

Multiply 24 to both sides:

x = 24 * 9/18

x = 216/18

x = 12
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