81/88 as a percentage is 92.05%. This number tells you that the fraction is just a little short of a whole, since 100% would be a perfect 1.
The fraction 81/88 is a simple way to show a part of a whole when you have 81 items out of a total of 88. Because the denominator is only a little bigger than the numerator, the value stays high, landing in the low 90s when expressed as a percentage.
You might see this kind of fraction in real life when measuring success rates, test scores, or any situation where you compare a small shortfall to a larger total. Remember, 92.05% means you are doing very well, just a few points away from perfection.