Created column isn't calculating as expected

I have two calculated columns from my dataset. I am trying to get a % figure based on these columns. As you can see from the picture below the columns calculate correctly and have been sorted by operatorname as I would hope but the % calculation hasn't worked. I would expect the abort % column to be 15/66 = 0.227 and so on but that's not what I'm seeing. Am I doing something wrong?