Question

A teacher has 84 books in her classroom The ratio of fiction to nonfiction is 4:3 how many of each type of book does she have?

Answer 1

The teacher has 48 fiction books and 36 non-fiction books.

1) 4*12=48  3*12=36
2) 48+36=84
3)4:3 = 48:36

Answer 2

Since the ratio is 4:3, you can set the equation 7x = 84
and 4x = fiction, 3x = nonfiction.
x=12

so there are 48 fiction and 36 nonfiction