15/30 = 50%
A value of 50% shows up in everyday life when a store offers half off, a game is halfway finished, or a team wins half its matches. It means the amount is split evenly into two equal parts.
A quick way to picture 15/30 is to imagine 30 items divided into two equal groups of 15. If you have 15 of those items, you have exactly one of the two groups.
One common mix-up is thinking that 50% always means 50 items. It actually means half of the total, so the number of items depends on how many there are altogether.
