Write the two numbers as a fraction: a:b or a/b
Divide both numbers by their greatest common divisor
Simplify the ratio to its lowest terms
If needed, express the ratio as x:y
Example: 8 and 12
Divide both by 4
Ratio = 2:3
Write the two numbers as a fraction: a:b or a/b
Divide both numbers by their greatest common divisor
Simplify the ratio to its lowest terms
If needed, express the ratio as x:y
Example: 8 and 12
Divide both by 4
Ratio = 2:3