39.80% is the percentage form of the fraction 39/98. This number tells you how much of a whole 39 parts represent when the whole is divided into 98 equal pieces.
The fraction 39/98 can be thought of as a part of a set, like 39 out of 98 students who passed a test. Saying it as a percentage makes it easier to compare with other data, because most people are used to seeing results in percent form.
When you see 39.80%, you know that just under four‑tenths of the whole are represented. It’s a handy way to understand the size of the fraction without having to work with the original numbers.