84.00% is the percentage equivalent of the fraction 21/25. This number tells you how much of a whole 21 parts out of 25 represent when expressed in terms of 100.
When you see 21/25 in real life, think of it as a large part of a whole—almost five‑fifths. It’s useful in situations like scoring on a test, where getting 21 out of 25 correct translates directly to an 84.00% score.
Because the fraction is close to one, the percentage is also high. Remember, 84.00% means you have 84 out of every 100 parts, which is a solid, above‑average result in most contexts.