12/42 as a percentage is 28.57%. This number tells you how much of a whole 12 parts out of 42 represent when you look at it in terms of 100.
The fraction 12/42 can be reduced by dividing both the top and bottom numbers by their greatest common divisor, which is 6. That gives you the simpler fraction 2/7. Even in this reduced form, the value stays the same, and the percentage remains 28.57%.
Seeing the percentage helps you quickly compare the size of the fraction to other numbers that are also out of 100. For example, if you had a test where you answered 12 out of 42 questions correctly, you scored about 28.57%, which is a clear, easy‑to‑read figure.
In everyday use, rounding to two decimal places keeps the number tidy while still being accurate enough for most purposes. So whenever you need to express 12/42 in a more familiar way, just remember it’s roughly 28.57%.
