66/75 as a percentage is 88.00%. This value tells you how much of a whole 66 parts out of 75 represent, rounded to two decimal places.
The fraction 66/75 can be reduced by dividing both numbers by 3, giving 22/25. That simpler form shows the same proportion in a way that's easy to compare with other common fractions, like 1/2 or 3/4.
In everyday life, you might see this percentage on a test score, a discount, or a performance rating. An 88.00% result suggests a strong performance, just a little short of a perfect score.