8/21 as a percentage is 38.10%. This means that if you split something into 21 equal parts, taking 8 of those parts is just a little over a third of the whole.
The fraction 8/21 can also be written as a decimal (about 0.381), which is another way to see how close it is to 40 %. It’s a tidy fraction because 8 and 21 share no common factors, so it stays in its simplest form.
Knowing that 8/21 equals 38.10% can be handy in everyday situations—like figuring out a discount, a portion of a recipe, or the part of a class that earned a certain grade. It gives a quick sense of scale without having to work with long numbers.
