9/27 as a percentage is 33.33%. This simple fraction reduces to 1/3, and when expressed as a percent it comes out to a little over one‑third of a whole.
The fraction 9/27 can be simplified by dividing both numbers by 9, giving 1/3. Seeing it as a part of 100 makes it easy to understand: one‑third of anything is roughly 33 out of 100.
Because the result repeats (33.333…), we round it to two decimal places for everyday use. That’s why 33.33% is the standard way to write the percentage for 9/27.