45/90 = 50%
A value like 45/90, or 50%, can show up when a store advertises a half-off sale or when a student gets half the questions right on a quiz. It describes a situation where one part is equal in size to the other part.
To picture it quickly, imagine a pizza cut into two equal halves, with one half shaded or eaten. You can also think of filling a cup exactly halfway.
A common mistake is to think 50% always means 50 items, but it means half of whatever total you’re comparing. For example, half of 90 items is much more than half of 10 items.
