77/88 as a percentage is 87.50%. This value is already rounded to two decimal places, so you can use it directly in any calculation or report.
The fraction 77/88 can be simplified by dividing both the numerator and the denominator by their greatest common divisor, which is 11. Doing that gives you 7/8, a much easier fraction to work with in everyday situations.
Seeing 7/8 as a part of a whole makes it clear why the percentage is so high. Seven out of eight equal parts are covered, leaving only one part missing, which translates to a strong majority in percentage terms.
Whenever you need to compare this fraction to other numbers, just remember that 87.50% represents its size relative to a full 100%. This makes it simple to see how it measures up against other percentages or fractions.