Converting A Pattern

Okay, this pattern says 20sts to 4 inches, first of all why don’t they say per 1 inch? Becuase that’s 5sts to 1 inch, right?
Okay secondly, I am knitting 8sts to 1 inch, how do I convert this pattern to work with my yarn?
Thank you very much!

Here you go!! I’ve used this link a few times and it’s fantastic. Basically what to do if you want to use a different gauged yarn for a pattern that you love. Good luck!!