The fraction 18/36 is equal to 50.00%. This simple conversion shows that half of something is represented by this fraction.
When you reduce 18/36 to its lowest terms, you get 1/2. Both numbers share a common factor of 18, so dividing each by 18 gives the simplified fraction 1/2, which is exactly half.
Seeing 50.00% in everyday life is easy. It can mean you ate half of a pizza, you passed a test with a score of 50 out of 100, or you split a bill right down the middle.
In short, 18/36 and 50.00% both tell the same story: one part out of two, or half of the whole.