71/91 as a percentage is 78.02%. This number tells you how much of a whole the fraction represents when you look at it in terms of 100 parts.
The fraction 71/91 is already in its simplest form because 71 and 91 share no common factors besides 1. It is a little less than three‑quarters of a whole, which makes sense when you see it expressed as about 78 %.
When you need to compare this value to other percentages, just remember that 78.02% is the rounded result you get from 71 divided by 91. It’s a handy way to see the size of the fraction at a glance.