Express your ratio in simplest form : 85 out of 102

Our current ratio is:
85 : 102
To put this ratio in simplest form, we need to check all the factors of each number and see if there is a number in common.
Let's factor 85.
85 = 1 x 85, 5 x 17.
Let's factor 102.
102 = 1 x 102, 2 x 51, 3 x 34, 6 x 17.
These two numbers have 17 as the greatest number in common.
Divide both numbers by 17 to find the ratio in simplest form.
85 / 17 = 5
102 / 17 = 6.
Your simplified ratio is 5 : 6.
I hope this helps!