17 answers
(click or scroll down)
1 to 3
2 to 6
3 to 9
4 to 12
2 to 6
3 to 9
4 to 12
1:3 * 2 = 2:6
1:3 * 3 = 3:9
It's the same as simplifying fractions.
4/12 = 3/9 = 2/6 = 1/3
3:15
4:20