Question

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

Answer 1

the book owner must need 12 more books to have the same ratio of fiction books because 9+6=15 and 27-15=12