3/91 = ≈3.3%
Rounded to 2 decimal places.
A value like 3.3% might show up in a small survey result, such as 3 people out of 91 choosing the same answer. You might also see a rate around this size when tracking occasional defects or rare events.
A quick way to picture it is about 1 out of every 30 things. So in a group of 90, you’d expect roughly 3, which gives you a handy estimate without needing exact math.
One common mix-up is treating 3.3% as exactly 3 out of every 100. The fraction 3/91 is a little larger than 3/100 because its denominator is smaller.