80/99 = ≈80.81%
Rounded to 2 decimal places.
A value like 80/99, or about 80.81%, could describe how many students in a class passed a test or how often a bus arrived on time. It shows that something happened most of the time, but not every time.
To picture it quickly, think of a little more than 80 out of every 100 items. It is close to four-fifths, so imagine about four parts of a whole split into five equal parts.
One common mix-up is treating 80/99 as exactly 80%. Since the denominator is 99 rather than 100, the value is a bit higher than 80%.