8/40 as a percentage is 20.00%. This tells you that the part 8 out of 40 represents one‑fifth of the whole, and one‑fifth expressed in percent is twenty percent, shown here with two decimal places.
The fraction 8/40 can be reduced by dividing both numbers by 8, giving 1/5. Whether you write it as 8/40, 1/5, or 20.00%, each form shows the same proportion of a whole.
Knowing the percentage makes it easy to compare with other values. For example, if a test score is 20.00% of the total points, you can quickly see it is a low score, while a discount of 20.00% on a purchase is a common and easy‑to‑understand reduction.
