Let's make it easier for you to visualize how percents work. If you are paid 100 dollars for a day of giving super expert math lessons, but after taxes, only have 10 dollars at the end of the day when they pay you, then you've been robbed of 90% of your hard won income and left with only 10%, correct?
Now extrapolate 9/125 X 100 = how many percent?
I was checking your math, not disagreeing with it. I did it that way to point to the number 125 as a too low figure. Cut the snark.