15/401 = ≈3.74%
Rounded to 2 decimal places.
A fraction like 15/401 can show up when 15 people out of a group of 401 respond to a survey, report a problem, or qualify for a special offer. That means the share is about 3.74%, which is a fairly small portion of the whole group.
To picture it quickly, imagine 401 dots or people with only 15 highlighted. You can estimate it as just under 4 out of every 100, or roughly 1 person in 27.
A common mistake is to think 15/401 is close to 15%, because the numerator is 15. The denominator matters just as much: since 401 is much larger than 100, the actual percentage is far smaller.