15/39 as a percentage is 38.46%. This rounded figure is the quick way to see how the fraction compares to a whole.
The fraction 15/39 can be simplified by dividing both numbers by 3, giving 5/13. Even in its reduced form, it still represents the same part of a whole.
When you see 38.46% in a report or a chart, it means that roughly 38 out of every 100 parts are covered by the original fraction. Percentages like this are handy for comparing different amounts easily.
Remember, whether you use the fraction 15/39, the reduced 5/13, or the percentage 38.46%, they all describe the same proportion.