Question

The public library has volunteers shelve books after they have been returned. When Lisa arrives to volunteer, there are 5 non-fiction books for every 9 fiction books. If there are 117 fiction books to shelve, then how many non-fiction books need to be shelved?

Answer 1

Answer:

65 non-fiction books need to be shelved

Step-by-step explanation:

This question can be solved using a rule of three.

For each 5 non-fiction books, there are 9 fiction books. How many non-fiction books are there when there are 117 fiction books?

5 non-fiction - 9 fiction

x non-fiction - 117 fiction

$9x = 5*117$

$x = \frac{5*117}{9}$

$x = 65$

65 non-fiction books need to be shelved