18/36 = 50%
A value like 50% shows up in everyday life when a store advertises a half-price sale or a weather report says there is an even chance of rain. It can also describe a test score where someone got half the questions right.
To picture it quickly, imagine splitting a pizza, a chocolate bar, or a full tank of gas into two equal parts. One of those parts is about half of the whole.
A common confusion is thinking that a 50% discount means an item is free. It means the price is reduced by half, so you still pay for the other half.
