126/126 = 100%
A value like 126/126 shows up when something is completely finished or fully accounted for. For example, if all 126 students turn in a permission form, the group has reached 100% completion.
You can picture 126/126 as one whole circle, a completely filled progress bar, or every seat in a row being occupied. A quick estimate is easy because the top and bottom numbers are the same, so the fraction represents the entire amount.
A common mistake is thinking that the large numbers make the fraction greater than 100%. Since the numerator and denominator match, the value is exactly one whole, not 126 wholes or 126%.