The total number of books in the library is 1155.there are 20 times more nonfiction books than fiction books. how many fiction books and how many nonfiction are in the library

There is 20x more nonfiction than fiction so you do
20+1=21
so then to find out what of 1155 is we do
1155÷21=55
so then we times 55 by 20 because there are 20x more nonfiction than fiction
55x20=1100
soo now we know there is
1100 nonfiction books and
55 fiction books
to check whether we are right we can do
1100=55=1155
we are right because there is 1155 books in the library
hope i helped