11, 22, 33, 44, 55, 66, 77, 88 and 99 (11x1 to 9).
25%
Multiples of 100.
All of those numbers have an infinite number of multiples.
what is the ratio of multiples of 3 between 1 and 100 to all numbers between 1 and 100
101
101
All numbers have an infinite amount of multiples.
101
All of them.
101
16%
80 of them.