21/66 as a percentage is 31.82%. This value shows how much of a whole the fraction represents when we look at it in terms of hundredths.
The fraction 21/66 can be simplified by dividing both the numerator and the denominator by 3, giving 7/22. Even after simplification, the size of the fraction stays the same, and it still corresponds to the same percentage.
When you see a percentage like 31.82%, it tells you that the part is a little less than one‑third of the whole. This can be useful in everyday situations, such as figuring out a discount or a portion of a group.
Remember that percentages are just another way to write fractions, making it easier to compare and understand how big a piece is relative to a total of 100.