What is 21/45 as a percentage? It equals 46.67% (rounded to two decimal places). This number tells you that the fraction is a little less than half of a whole.
The fraction 21/45 can also be reduced to 7/15, which still represents the same part of a whole. Whether you write it as 21/45, 7/15, or 46.67%, the value stays the same.
Knowing the percentage makes it easy to compare with other numbers. For example, if you scored 46.67% on a quiz, you got just under half of the points possible. This quick view helps you understand performance without dealing with fractions.