Question

There are 11 books on a shelf. 4 of these books are new. The rest of them are used.

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

Answer 1

a. 4/11

b. 11-4= 7 used books. So the ratio of used books to all books is 11/7