9/30 as a percentage is 30.00%. This tells you that the fraction represents three‑tenths of a whole, which is the same as saying thirty percent when you look at it on a scale of 100.
The fraction 9/30 can be reduced to 3/10, making it easier to picture. One‑tenth is 10 % of a whole, so three‑tenth is exactly three times that amount. That’s why you end up with a clean 30 % value.
You’ll see this kind of conversion in everyday situations, like when a quiz score is 9 correct answers out of 30 questions. Saying you got 30.00% right is a quick way to communicate the result without using the original fraction.
