The fraction 21/90 is equal to 23.33% when converted to a percentage and rounded to the nearest two decimal places. This percentage represents how much of a whole the fraction represents. In other words, if you had 90 items and took 21 of them, you'd have about 23.33% of the total.
To put this in perspective, 23.33% is slightly less than one-quarter or 25% of something. It's a bit more than one-fifth (20%) but not quite one-fourth. This fraction could be useful in various real-world situations, such as calculating grades, measuring ingredients in cooking, or determining the completion of a project.