13/48 as a percentage is 27.08%. This simple figure tells you how much of a whole the fraction represents when you think in terms of hundredths.
The fraction 13/48 can be useful when dealing with parts of a group, like 13 students out of a class of 48. Seeing it as 27.08% makes it easier to compare with other percentages, such as test scores or survey results.
Remember that percentages give a quick sense of scale. So whenever you see 13 out of 48, you can think of it as roughly a quarter of the whole, or more precisely 27.08%.