33/90 as a percentage is 36.67%. This value tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 33/90 can be reduced to 11/30, which still gives the same percentage. Seeing it as a percent makes it easier to compare with other numbers, like scores or discounts, because most people think in hundredths.
In everyday situations, you might use this percentage to understand a portion of a budget, a test score, or a portion of a recipe. Knowing that 33 out of 90 is about 36.67% helps you quickly gauge the size of the part compared to the whole.