How do you figure aspect ratio 1 to 3?

Answer 1

Your question is a bit vague, but basiclly for every 4, you have 3. For example if you wanted to scale something up 6 sizes at a 4:3 ratio, it would be 24:18.

Answer 2

Put it in to a fraction which would be 1/3 so one third of the number is what you need to find. x