1/9 as a percentage is 11.11%. This rounded figure is easy to remember and works well for quick estimates. Whenever you see the fraction 1/9, you can think of it as a little over a tenth.
The fraction 1/9 is a repeating decimal: 0.111… where the 1 goes on forever. That endless string of ones is why the percentage also repeats, giving us the familiar 11.11% when we cut it off at two decimal places. It shows up a lot in everyday math, like dividing a pizza into nine equal slices.
Because 1/9 is close to 1/10, the percentage is just a bit higher than 10%. This makes it handy for quick mental math. If you need to compare it to other fractions, remember that 1/8 is 12.5% and 1/5 is 20%, so 1/9 sits nicely between those values.