What is 20/21 as a percentage? It is 95.24% (rounded to the nearest two decimal places). The fraction 20/21 is just a little bit less than a whole, so its percentage is close to 100%.
Since 20 out of 21 parts are included, the value feels almost complete. In everyday terms, this could represent a test score where you missed only one question out of twenty‑one, giving you a very high mark.
You can see the same idea in other situations, like a recipe that uses 20 cups of a 21‑cup mixture, or a sports team that wins 20 out of 21 games. In each case, the result is about 95.24% of the total possible.
