15/166 = ≈9.04%
Rounded to 2 decimal places.
A value like 15/166 could describe 15 people in a group of 166, such as students choosing a certain club or customers selecting a particular product. In percentage terms, that is about 9.04%, so it represents a fairly small but noticeable part of the whole.
To picture it quickly, think of about 9 out of every 100 people, or just under 1 person in 10. Since 15/166 is close to one-tenth, estimating it as around 10% is a useful mental shortcut.
A common mistake is to treat the 15 as if it were already a percentage, but the denominator 166 tells you how large the entire group is. It is also easy to read 9.04% as exactly 9%, even though it is a rounded estimate and slightly higher than 9%.