Respuesta :

18:30
6:10
3:5
Simplest form=3:5
Steps
18 divided by 3 equals 6
30 divided by 3 equals 10 so 6:10 then
6 divided by 2 equals 3
10 divided by 2 equals 5 so 3:5
You can’t divide 3:5 more so this is the answer.
Hope it helps you!