8/20 as a percentage is 40.00%. This means the fraction represents four‑tenths of a whole, which is the same as saying forty percent.
The fraction 8/20 can also be simplified to 2/5. Both forms show the same proportion of the whole, just written differently.
Seeing it as 40.00% makes it easy to compare with other percentages, like sales tax or test scores, because percentages are a familiar way to talk about parts of 100.
In everyday use, you might hear someone say “the success rate is 40.00%,” which is just another way of saying the outcome matches the fraction 8/20.