8/42 as a percentage is 19.05%. This tells you that the fraction represents just under one‑fifth of a whole. It’s a quick way to see how large (or small) the part is compared to the entire amount.
The fraction 8/42 can be reduced to 4/21, which is still a tiny piece of a whole. When you think of it in everyday terms, imagine 21 slices of pizza; you would have only 4 of those slices.
Knowing the percentage makes it easier to compare with other numbers. For example, if a test score is 19.05% of the total points, you’d know it’s a low score and that you need more practice.