18/69 as a percentage is 26.09%. This value tells you how much of a whole the fraction represents when you look at it in terms of hundredths. It’s a handy way to compare the fraction with other numbers that are expressed as percentages.
The fraction 18/69 can be reduced to its simplest form, 6/23, but the size of the portion stays the same. Whether you write it as 18/69, 6/23, or 26.09%, each expression shows the same relationship between the part and the whole.
Using the percentage makes it easier to understand things like grades, discounts, or statistics, because most people are comfortable working with “out of 100.” So whenever you see 26.09%, you know it’s just another way of saying 18 parts out of 69.