15/36 as a percentage is 41.67%. This number tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 15/36 can be simplified to 5/12, which is still the same amount. It is a little under one‑half, so you can think of it as a bit less than 50 out of 100.
Percentages like this are useful in everyday situations—whether you’re checking a discount, measuring a portion of a recipe, or comparing test scores. Knowing that 15/36 is 41.67% helps you quickly see that it’s less than half of the total.