66/99 as a percentage is 66.67%. This is the rounded value you get when you change the fraction to a percent and keep two decimal places.
The fraction 66/99 can be reduced by dividing both the numerator and the denominator by 33, giving 2/3. Whether you look at it as 66/99, 2/3, or 66.67%, the value stays the same.
You’ll see this kind of number when dealing with parts of a whole, like a score of 66 out of 99 points on a test. Knowing the percentage helps you quickly understand how much of the total you achieved.
