91/92 as a percentage is 98.91%. This number tells you that the fraction is very close to a whole, just a little under 100 %.
The fraction 91/92 means you have 91 parts out of a total of 92 equal parts. Because the numerator and denominator are so close, the value is almost one whole unit, which is why the percentage is nearly 100 %.
In everyday life you might see this kind of ratio when something is almost complete—like a test score of 91 out of 92 points, or a production line that meets 91 of 92 quality checks. The rounded figure 98.91% gives a quick, easy way to understand how high the success rate is.