What is 18/30 as a percentage? It is 60.00%. This number tells you how much of a whole 18 parts out of 30 represent.
The fraction 18/30 can be simplified by dividing both the top and bottom numbers by their greatest common divisor, 6. That gives you the simpler fraction 3/5. Both fractions describe the same amount, just in different forms.
Seeing 60.00% is useful in everyday situations—like figuring out a discount, a test score, or a recipe adjustment. It’s a quick way to understand that 18 out of 30 parts means you have three‑fifths of the whole, or sixty percent.