13/77 as a percentage is 16.88%. This value tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 13/77 is already in its simplest form because 13 and 77 share no common factors other than 1. It can be useful when comparing parts of a set that has 77 items, where 13 of those items are highlighted.
In everyday situations, you might see the percentage used instead of the fraction—for example, when a survey shows that 16.88% of respondents chose a particular option. Both the fraction and the percentage convey the same information, just in different formats.
