88/99 = ≈88.89%
Rounded to 2 decimal places.
A value like 88.89% might describe how often a bus arrives on time or how many questions someone answered correctly. It means the result is strong, but not quite perfect.
To picture it quickly, think of nearly 9 out of every 10 things being successful. It is a little less than 90%, so just over 11 out of every 100 are left over.
One common mix-up is treating 88/99 as exactly 88%. The 88 is the number of parts counted, while 99 is the total, so the percentage is a bit higher than 88%.