What is 9/45 as a percentage? It is 20.00%. This simple figure tells you that the fraction represents one‑fifth of a whole.
The fraction 9/45 can be reduced to 1/5, which is an easy way to see how small a part it is. One out of every five equal pieces makes up the whole, and that matches the 20 % value nicely.
You’ll often see this kind of percentage when dealing with discounts, test scores, or any situation where a part of a total is measured. Knowing that 9/45 equals 20.00% helps you quickly compare it to other percentages.