I was tweening an arrow for a dropdown gui for aesthetics and when I rotate 450 degrees forward, it is about 15 degrees off. I know that I could just make it rotate 435 degrees instead but I want to know why this happens and how to avoid this is if I come into the this problem again.

If you know why tweening ints makes it just a bit, please upvote and answer.

Thanks, PoWerofThEePg