87/94 as a percentage is 92.55%. This number shows how close the fraction is to a whole one. When you see 92.55% you know the fraction is almost one, but not quite.
The fraction 87/94 can also be thought of as 87 parts out of 94 equal parts. That means you are missing only 7 parts to make a full set. In everyday language this is a very high proportion, just a little under a complete whole.
Because the percentage is so high, it’s useful when you need to compare large amounts, like test scores or success rates. Saying “the result was 92.55%” is clearer for most people than writing the fraction 87/94.