9/18 as a percentage is 50.00%. This fraction reduces to a simple half, so the number is easy to remember. When you see 50 %, you know it means exactly one‑half of a whole.
The fraction 9/18 can be cut in half to 1/2, which is the same as 50 out of 100 parts. That’s why the percentage looks like a clean 50 %. It’s a useful reference point for many everyday calculations.
Because the result is a tidy half, you’ll often see it used in budgeting, cooking, or any situation that needs a quick split of something into two equal parts. Just remember: 9/18 equals 50.00%, and you’re good to go.