10/15 expressed as a percentage is 66.67%. This figure shows that the fraction represents a little more than two‑thirds of a whole.
If you reduce the fraction, 10/15 simplifies to 2/3. Both forms—10/15 and 2/3—share the same value, so the percentage stays the same no matter which version you start with.
Knowing this percentage is handy for quick comparisons. For example, if you score 10 out of 15 points on a quiz, you’ve earned 66.67% of the possible points, which can help you gauge your performance at a glance.