15/18 as a percentage is 83.33%. This is the decimal value turned into a percent and rounded to two decimal places. The fraction itself can be reduced to 5/6, which is a common way to see the same size in simpler terms.
When you think of 5/6, picture six equal parts of something and you have five of those parts. That same amount is just over four‑fifths, which is why the percentage is close to 80 %. It’s a handy number to remember for quick estimates.
In everyday use, you might see 83.33% on a test score, a discount, or a success rate. Knowing that 15 out of 18 is the same as about 83 % helps you compare it easily with other percentages you encounter.
