73/87 as a percentage is 83.91%. This value tells you how much of a whole the fraction represents when you look at it on a scale of 100.
The fraction 73/87 cannot be reduced any further, so it stays as it is. It is a little less than 6/7, which helps you picture it as being close to three‑quarters but a bit higher.
When you need to use this number in everyday situations—like calculating a grade, a discount, or a statistic—rounding to two decimal places (83.91%) makes it easy to read and compare with other percentages.