9/99 as a percentage is 9.09%. This is the rounded value you get when you look at the fraction in a percent form.
The fraction 9/99 can be reduced to 1/11, which still represents the same part of a whole. Whether you write it as 9/99, 1/11, or 9.09%, the value stays the same.
Knowing this percentage can help in quick comparisons. For example, if you see a discount of about 9 % on a price, you’re seeing a change that is close to the size of 9/99 of the original amount. It’s a handy number to recognize in everyday situations.
