Question

There are 15 books on a shelf. 6 of these books are new.(
a. What is the ratio of all books to used books?(
b. What is the ratio of new books to used books?

Answer 1

The ratio of all books to used books = all books ÷ used books = 15 / (15-6) = 5/3


The ratio of new books to used books = new books ÷ used books = 6 / 9 = 2/3


I hope that helps!