18/46 as a percentage is 39.13%. This is the rounded value you get when you change the fraction into a percent, and it’s accurate to two decimal places.
The fraction 18/46 can be simplified to 9/23, which is still the same value. Whether you write it as a fraction or a percent, it represents just under two‑fifths of a whole.
Knowing the percentage helps when you compare parts of a whole, like figuring out a discount or a test score. Seeing it as 39.13% makes it easier to understand at a glance.