20/68 as a percentage is 29.41%. This is the rounded value you’ll see most often, and it gives a quick sense of how big the fraction is compared to a whole.
The fraction 20/68 can be simplified to 10/34 and then to 5/17, but the decimal form (0.2941…) and the percentage are usually more handy for everyday use. Saying “about 30 %” is close enough for rough estimates, while 29.41% is the exact rounded figure.
When you need to compare this part to other numbers—like a test score or a portion of a budget—using the percentage makes it clear and easy to understand. It’s a simple way to see that 20 out of 68 is just under one‑third of the whole.