20/55 = ≈36.36%
Rounded to 2 decimal places.
A value of 36.36% might describe how many people in a group chose a certain option, such as 20 out of 55 students preferring a particular lunch. It could also show how much of a task is finished or how many items in a batch meet a certain standard.
To picture 20 out of 55, imagine splitting the whole group into about three equal parts and shading a little more than one part. That makes it easy to estimate the amount as just over one third.
A common point of confusion is treating 36.36% as the same as 36.36 whole items. It describes a share of the total, so the number of items it represents depends on how many items there are altogether.