Is 12/30 and 18/45 proportional, or not proportional?

12/30 = 18/45, so first you're going to cross multiply and you'll get (30)(18) = (12)(45). Then you can see that 540 = 540 same number so they're proportional...

BTW THIS WAY IS A LOT EASIER.

12/30 = 2/5

18/45 = 2/5

So yes, in summary, they're proportional to each other. Hope this helps, have a BLESSED and wonderful day! :-)

if you mean

then it's c. 8, -7/3

but if you mean

then it is

faster, im not sure why but i know it is faster