30/60 = 50%
A value of 50% shows up in everyday life when a store offers half off, a team wins half its games, or a bottle is half full. It describes a part that is equal to the other part.
To picture it quickly, imagine splitting a pizza, a class, or a strip of paper into two equal groups. One of those groups is the amount you’re looking at.
A common mix-up is thinking that 50% off means you pay half again, rather than that half the original price is taken off. The final price is half of what it was before the discount.