98/99 = ≈98.99%
Rounded to 2 decimal places.
A value like 98/99, or 98.99%, can show up when almost everything succeeds or is included. For example, a website might be available nearly all the time, or a factory might produce only one faulty item out of every 99.
You can picture 98/99 as a nearly full group with just one tiny piece missing. Since it is so close to 100%, a quick estimate is “about 99 out of 100” rather than exactly 98 out of 100.
A common mistake is to treat 98/99 as exactly 98%, because the numerator is 98. The denominator matters too, so 98 out of 99 is noticeably closer to 100% than 98 out of 100.