Beinggreat78, this is mostly for you. but whoever gets it right can have brainliest, but answer ASAP!

Let's simplify these ratios:-
1. 3:9
Divide both sides by 3:-
1:3
2. 9:27
Divide both sides by 9:-
1:3
3. 2:4
Divide both sides by 2:-
1:2 (Option C)
4. 30:90
Divide both sides by 30:-
1:3
Hope everything is clear; if you need any explanation/clarification, kindly let me know, and I will comment and/or edit my answer :)