9/90 as a percentage is 10.00%. This small fraction shows up often when we talk about parts of a whole, especially when the whole is divided into ten equal pieces. The number 10.00% tells you that the fraction represents one‑tenth of something.
The fraction 9/90 can be reduced to 1/10, which is easy to picture: imagine ten equal slices of a pizza and taking just one slice. That single slice is exactly what the percentage is describing—one out of ten parts.
When you see 10.00% in a report or a chart, you now know it comes from the simple fraction 9/90. It’s a quick way to communicate a small, clean portion of a whole without having to write the fraction each time.
