9/48 as a percentage is 18.75%. This figure tells you how much of a whole the fraction represents in a way that’s easy to compare with other percentages you see every day.
The fraction 9/48 can be reduced to 3/16, which is a simple way to see the same size using smaller numbers. Whether you think of it as 9 parts out of 48, or 3 parts out of 16, the portion stays the same.
In real life, 18.75% might be the part of a budget you spend on a hobby, the slice of a pizza you get, or the share of a class that prefers a certain color. Knowing the percentage makes it quick to understand just how big or small that share is.