4/45 as a percentage is 8.89%. This number tells you how much of a whole 4 parts out of 45 represent when the whole is shown as 100.
The fraction 4/45 is a small part of a whole. It’s less than one‑tenth, which means it’s useful when you need to describe a tiny portion, like a small discount or a tiny slice of a pie.
Because the percentage is easy to read, you can quickly compare it to other percentages. For example, 8.89% is lower than 10% but higher than 5%, giving a clear sense of where the fraction stands in everyday situations.