37/74 = 50%
A value like 50% shows up in everyday situations, such as when half the seats on a bus are taken or a sale cuts a price in half. The fraction 37/74 describes that same kind of halfway point.
To picture it quickly, imagine splitting a group into two equal parts and shading one part. Since 37 is half of 74, 37/74 is right at the halfway mark.
One common point of confusion is thinking that 50% always means 50 items. It means half of whatever whole you are talking about, so the number of items can vary.