320/320 = 100%
A fraction like 320/320 shows up when something is fully completed or accounted for. For example, if all 320 students turn in a permission form, the school has received 100% of the forms.
You can picture 320/320 as one whole thing with nothing missing. A quick estimate is to notice that the top and bottom numbers are identical, which means the amount is complete.
A common mistake is thinking the large numbers make the fraction greater than 100%. The size of the numbers does not matter when they are equal; 320/320 still represents exactly one whole, or 100%.
