30/57 expressed as a percentage is 52.63%. This value comes from the fraction when it is turned into a part of a whole and rounded to two decimal places. It shows that the fraction is just over half of a full amount.
The fraction 30/57 can be simplified by dividing both numbers by their greatest common divisor, which is 3. This gives the simpler form 10/19. Even in its reduced form, it still represents the same proportion of the whole, so the percentage stays at 52.63%.
Knowing the percentage helps when you need to compare this portion to other values, such as scores or parts of a budget. It’s a quick way to see that 30 out of 57 is a little more than one‑half.