Beth is looking at her book collection and is wondering how many comic books she owns. She has 120 books and 65% are novels. 18 are graphic novels. The rest are comic books. What percentage of comic books does she own?
Thoughts? Step-by-step reasoning:
The proportion of graphic novels is .15 because 18 / 120 = .15. The percentage of graphic novels is 15 because 100 x .15 = 15. The percentage of comic books is 20 because 100 - 65 - 15 = 20.
Thus, the answer is 20.