21/24 is equal to 87.50% when expressed as a percentage. This tells you that the fraction represents just under nine‑tenths of a whole.
The fraction 21/24 can be simplified to 7/8, which is a common way to see how big the part is compared to the whole. Both forms show that the portion is large—more than half and close to a full unit.
In everyday situations, you might use this percentage to describe a score, a completion rate, or any measurement where 21 out of 24 parts are achieved. Knowing that it equals 87.50% helps you quickly compare it with other percentages.