Question

The library at school is organized by fiction and nonfiction books. There are 3 nonfiction books for every 7 fiction books. How many total books are there if the library has 240 nonfiction books?

Answer 1

There are 800 total books

Answer 2

There are 800 total books.

Explanation:

In order to find this, we need to create a proportion that compares the number of non-fiction books to the total. First would be the scale factor and the second would be the total.

3/10 = 240/x

Now we can cross multiply to solve

240*10 = 3 * x

2400 = 3x

800 = x