15/21 as a percentage is 71.43%. This rounded figure shows how much of a whole the fraction represents. It’s a quick way to see the size of the fraction without doing long division every time.
The fraction 15/21 can be reduced to 5/7, which is a simple ratio you might see in recipes, sports stats, or school projects. Knowing that 5 parts out of 7 are about seventy‑one percent helps you compare it to other numbers easily.
Percentages like 71.43% are useful for describing parts of a whole in everyday life. Whether you’re looking at test scores, discounts, or survey results, converting a fraction to a percent makes the information clear and relatable.
