21/36 as a percentage is 58.33%. This rounded figure shows how much of a whole the fraction represents when you look at it in terms of percent.
The fraction 21/36 can be reduced to 7/12, which still keeps the same value. Whether you write it as 21/36, 7/12, or 58.33%, each form tells you the same proportion of a whole.
Percentages like this are useful in everyday situations—such as figuring out discounts, test scores, or the part of a recipe you need. Knowing that 21 out of 36 parts equals about 58 % helps you quickly understand the size of the share.
