63/66 as a percentage is 95.45%. This fraction is very close to one whole, which is why the percentage is just under 100%. It’s a handy number when you need a quick estimate of something that’s almost complete.
The fraction 63/66 can be reduced to 21/22, but the value stays the same. Whether you see it as 63 out of 66 or 21 out of 22, the proportion is still the same high percentage.
In everyday use, you might round this to 95% when a rough figure is enough, but for more precise work the 95.45% figure gives a clearer picture of how close the fraction is to a full whole.
