Question

ryan has a collection of 140 books to donate to the neighborhood library. 20% of the books are children’s books, 25% are non - fiction, and the rest are fiction. how many books in ryan’s collection are fiction?

Explanation:

Step1: Calculate percentage of fiction books

First, find the total percentage of non - fiction and children's books. The percentage of children's books is 20% and non - fiction is 25%. So the combined percentage is \(20\%+ 25\%=45\%\). Then the percentage of fiction books is \(100\% - 45\% = 55\%\) or \(0.55\) in decimal form.

Step2: Calculate number of fiction books

The total number of books is 140. To find the number of fiction books, we multiply the total number of books by the percentage of fiction books. So the number of fiction books is \(140\times0.55 = 77\).

Answer:

77