Question

55 percent of 120 books are fictional how many are non fictional

Answer 1

1-.55 = .45
120*.45 = 54 are non-fiction

Answer 2

55 percent of 120 is 66.

120 - 54 = 66.

66 Books are fictional

So that being said, the other part of your remaining total is 54. 54 books are non-fictional. (The above where I said 120-54). Since 120 - 66 = 54.