The fraction 13/61 is equal to 21.31% when converted to a percentage and rounded to two decimal places. This means that if you had 61 items and took 13 of them, you'd have about 21% of the total. It's a bit more than one-fifth but less than one-quarter of the whole.
While 21.31% might seem like an odd number, it's actually pretty common to see percentages that aren't nice, round figures in real-world situations. For example, you might encounter this kind of percentage when looking at things like test scores, election results, or financial data. It's always good to be comfortable working with these more precise figures, even if they're not as neat as 25% or 50%.