78/84 expressed as a percentage is 92.86%. This shows that the fraction is very close to a whole, indicating a high proportion.
If you simplify 78/84, you get the reduced fraction 13/14. Both forms represent the same amount, just written differently.
Knowing that 92.86% is the percentage helps when you need to compare it to other percentages, such as test scores or discount rates, making it easy to see how large the portion really is.