Is 2:9 equal to 4:18

It is. The reason? I will explain

2:9 is equal to 4:18 because if you multiply both sides by 2, they are 4:18.

So as long as you multiply both sides evenly by the same number, they are equivalent as you see

So lets try the other way around and reduce.

Get 4:18 and divide both sides by 2

4:2=2 and 18:2=9 so it would be 2:9

Answer: So yes, based on what I showed you, they are equal.