5/15 as a percentage is 33.33%. This is the rounded value you would see on a report card, a sales chart, or any quick glance at a proportion.
The fraction 5/15 can be simplified by dividing both the numerator and the denominator by 5, giving you 1/3. Whether you write it as 5/15, 1/3, or 33.33%, the size of the part stays the same—a third of the whole.
Using the percentage makes it easy to compare with other numbers. For example, if you earned 33.33% of a possible score on a test, you know you got about one‑third of the total points. This quick view helps you understand performance without needing to work with fractions directly.