Question

99 books into three groups so the ratio of the groups is 2 to 3 to 4

Answer 1

2+3+4x=99
9x=99
x=11

2 times 11=22
3 times 11=33
4 times 11=44

So the amount of books in each group is 22 books, 33 books, and 44 books.

Answer 2

2:3:4
22:33:44 will be the answer