4320/4320 = 100%
The fraction 4320/4320 represents a complete amount, so it equals 100%. You might see a value like this when every student turns in an assignment, a battery is fully charged, or a team completes every step of a project.
You can picture it as one whole pizza with every slice still included, or a full container with nothing missing. A quick estimate is easy because the top and bottom numbers are the same, which signals that the entire amount is present.
A common mistake is thinking the large numbers make the percentage unusually high. The actual size of the numbers does not matter here; what matters is that the numerator matches the denominator, meaning there is no part left out.