Michael V. answered 12/10/18
Retired military service member with 10+ years teaching experience
If there are 18 total beads, 6 are red, and the rest are blue, that means that there are 12 blue beads. (18-6=12).
So now we can ask ourselves 12 is what fraction of 18? This equation looks like:
18x=12
-18 /18
x=12/18
x=2/3