78/78 = 100%
A fraction like 78/78 shows up when all 78 items in a group are complete, such as every student turning in an assignment or every seat being filled. It represents 100%, meaning the entire amount is included.
You can picture 78/78 as a full container, a completely shaded bar, or a finished progress circle. A quick estimate is easy because the numerator and denominator are the same, so the value is the whole amount rather than part of it.
A common mistake is thinking that 78/78 must be a large number because 78 appears twice. In reality, any nonzero number divided by itself equals one whole, so 78/78 has the same value as 1 and 100%.