75/76 as a percentage is 98.68%. This fraction is just a little bit less than a whole, so its percentage is very close to 100%.
Because the value is so high, it shows up in situations where almost everything is achieved, like a test score of 75 correct answers out of 76 questions.
In everyday language, you could say something is "about 99 % complete" when you really mean 98.68 %. It’s a handy way to describe something that is nearly finished.
Remember, when you see a fraction with a numerator only one less than the denominator, the percentage will always be just under 100 %.