66/82 as a percentage is 80.49%. This rounded figure gives a quick sense of how large the fraction is compared to a whole.
The fraction 66/82 can be reduced to 33/41, which shows it is a little more than three‑quarters (0.75). In decimal form it is about 0.8049, so when we express it as a percent we get the rounded 80.49%.
Knowing this percentage is handy for everyday calculations, like figuring out a test score or a discount. It tells you that 66 parts out of 82 is roughly eight‑tenths of the total.
