What is the ratio as a fraction in simplest form 30 to 18

The ratio is  ( 30 / 18 ) .

If you want to simplify it, you have to divide the top and the bottom both by some common factor that they have.

Just looking at it, you can probably see that the top and bottom are both multiples of 2, AND they're also both multiples of 3 .

WELL !  If a number is a multiple of 2 AND it's also a multiple of 3, then it has to be a multiple of 6 !  So let's divide the top and bottom of the fraction by 6 .

Then it says  (5 / 3) .

At this point, 5 and 3 don't have any common factor, so that's it.  That's the ratio in simplest form.