75/86 as a percentage is 87.21%. This fraction is just a little less than nine‑tenth, so when you turn it into a percent it lands right around the high‑80s.
The fraction 75/86 can be thought of as 75 parts out of a total of 86 equal parts. Because the denominator is a bit larger than the numerator, the value is close to, but not quite, 1 (or 100%). That’s why the percentage is high but still under 90%.
In everyday use, you might see 87.21% on a report card, a survey result, or a sports statistic. It tells you that for every 100 units, about 87 of them meet the condition you’re measuring. This makes the number easy to compare with other percentages.