What is

the ratio equal for 90:18

To find the ratio between 2 numbers, you need to find the GCF of those 2 numbers. If the GCF is the ratio, the ratio is in it's simplest form.

GCF of 90 and 18 is 18

divide both numbers by the GCF and the final simplest ratio is 5:1

U have to think what numbers go into both those numbers

the biggest number that will go in

9 goes into 90 and 18

it goes to 90 ten times

and into 18 twice

so the ratio in its simplest form it 10:2