87/99 as a percentage is 87.88%. This is the value you get when you turn the fraction into a percent and round it to two decimal places.
The fraction 87/99 is close to one whole, so its percent is also close to 100 %. It’s a handy number to remember when you need a quick estimate for similar fractions.
If you ever need to compare it to other percentages, just think of 87.88% as a little less than 90 % and a lot more than 80 %. This makes it easy to see where it falls in everyday situations.