21/45 as a percentage is 46.67%. This tells you that the fraction is just under half when you look at it on a 100‑point scale.
The fraction 21/45 can be reduced to 7/15, which still represents the same part of a whole. It shows that for every 15 equal pieces, 7 of them are taken.
In everyday life, you might see this kind of percentage when dealing with scores, discounts, or statistics. Knowing that 21/45 equals 46.67% helps you quickly understand the size of the portion compared to a full 100 %.
