84.00% is the percentage that corresponds to the fraction 84/100 (rounded to two decimal places).
The fraction 84/100 means you have 84 parts out of a total of 100 equal parts. It’s the same as saying you got 84 out of 100 points on a test or that 84 out of every 100 items meet a certain condition.
When you see 84.00%, you can quickly understand it as a proportion that is close to four‑fifths. This makes it easy to compare with other percentages, like 75% or 90%, without having to think about the original fraction.
In everyday use, writing the percentage instead of the fraction helps people read numbers faster, especially in charts, reports, or school grades. It tells the same information in a format most people expect.