The fraction 9/90 equals 10.00% when expressed as a percentage. This value is rounded to two decimal places for clarity.
Since 9 and 90 share a common factor of 9, the fraction simplifies to 1/10. That simplified form makes it easy to see why the percentage is a clean, round number.
In everyday use, you can think of 10 % as one part out of ten equal parts. So whenever you see 9/90, just remember it represents a tidy ten percent.