13/81 = ≈16.05%
Rounded to 2 decimal places.
A value like 13/81, or about 16.05%, could describe the share of people in a group of 81 who choose a certain option. It might also show up in a survey, a class poll, or a report about how often something happens.
To picture it quickly, imagine 81 items split into roughly six equal groups: 13 items is a little less than one of those groups. So 13/81 is a bit less than one-sixth, or just over 16%.
A common mix-up is to treat 13/81 as exactly 16.05%, when that percentage is rounded. Also, the 81 is the whole group, so changing the total can change the percentage even if the count stays at 13.