20/66 as a percentage is 30.30%. This rounded figure tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 20/66 can be simplified to 10/33, but whether you keep it as 20/66 or 10/33, the size of the part stays the same. It’s a little less than one third of a whole, which matches the 30.30% you see.
When you need to compare this value to other percentages, just remember that 30.30% is the quick way to show the same amount in everyday terms. It’s useful for things like grading, budgeting, or any situation where a percent makes the number easier to understand.