30.77% is what you get when you turn the fraction 8/26 into a percentage.
The fraction 8/26 can be reduced to 4/13, but the percentage stays the same. Saying it as a percent makes it easier to compare with other numbers, especially in everyday situations like shopping discounts or test scores.
If you need a quick reference, just remember that 8 out of every 26 parts is about 30.77% of the whole. This rounded value works well for most practical uses.