73/87 as a percentage is 83.91%. This number tells you how much of a whole the fraction represents when you think of the whole as 100 %.
The fraction 73/87 is already in simplest form, and it’s a little more than four‑fifths of a whole. Seeing it as a percentage makes it easier to compare with other values that are also expressed out of 100.
In everyday situations, you might use this percentage to describe a test score, a discount, or any proportion where you need a quick, understandable figure. It’s a handy way to communicate that something is just under 84 % of the total.