249/249 = 100%
A fraction like 249/249 shows up when all 249 items in a group are complete, approved, or accounted for. For example, if every student turns in an assignment or every package in a shipment arrives, the result is 100%.
You can picture it as one whole circle filled in completely, with no empty space left. Since the top and bottom numbers are the same, you can quickly estimate that the fraction represents the entire amount.
A common point of confusion is thinking that a large denominator makes the percentage less than a whole. The numbers may be large, but when the numerator matches the denominator, the fraction still represents everything.