The fraction 21/48 expressed as a percentage is 43.75%. This rounded value tells you how much of a whole the fraction represents in everyday terms.
If you simplify 21/48, you get 7/16. Both the simplified fraction and the percentage describe the same part of a whole, just in different formats.
Percentages like this are handy when you need to compare parts of a whole, such as seeing what portion of a class scored above a certain grade or how much of a budget has been spent.
Remember, 43.75% is just another way to say “almost half” of something, which can make numbers easier to understand at a glance.