The fraction 13/100 is equal to 13.00% when expressed as a percentage. This means that if you have 13 parts out of a total of 100, you're dealing with 13 percent of the whole. It's a pretty small portion, just over one-tenth of the total.
You might come across this percentage in various real-world situations. For example, a 13% discount on a purchase would save you $13 for every $100 you spend. Or if 13% of students in a class wear glasses, that's about 13 students out of every 100. It's not a huge amount, but it's definitely noticeable when you're talking about larger numbers or important statistics.