10/66 as a percentage is 15.15%. This number shows how much of a whole the fraction represents when it is expressed as a part of 100.
The fraction 10/66 can be simplified to 5/33, which still represents the same proportion. Even though the numbers look different, the value stays the same, so the percentage stays 15.15%.
Seeing a percentage like this is useful in everyday situations, such as figuring out a discount, a test score, or a share of a group. When you see 15.15%, you know it is a little more than one‑tenth of the whole.
Because the result is rounded to two decimal places, the exact value might be a tiny bit higher or lower, but 15.15% is the standard way to write it for clear communication.
