Question

There are 12 books on a shelf. 7of these books are new.

(a) What is the ratio of new books to used books?
(b) What is the ratio of all books to used books?

Answer 1

(a) 5:7 ( 5 new to 7 used). (B) 12:7 (12 books to 7 used ones). You are welcome :)

Explanation:

Answer 2

(a) 7 : 5

(b) 19 : 5

Hope this helps :)