5/21 expressed as a percentage is 23.81%. This number tells you how much of a whole 5 parts out of 21 represent when you look at it in hundred‑parts.
When you see 23.81% on a chart or a report, you know it’s the same as the fraction 5/21. It’s useful for quick comparisons because most people think in terms of percentages rather than fractions.
Remember that the percentage is rounded to two decimal places, so the exact value is a little bit different, but 23.81% is the standard way to write it for everyday use.
