9/42 as a percentage is 21.43%. This simple number tells you how much of a whole 9 parts out of 42 represent when you look at it in percent form.
The fraction 9/42 can be reduced to 3/14, which is easier to work with in many problems. Both fractions describe the same portion of a whole, just written in different ways.
Knowing the percent helps when you compare this part to other percentages, like in grades, discounts, or statistics. It’s a quick way to see that 9 out of 42 is just a little over one‑fifth of the whole.
