First step: figure out how much one pizza costs. If a quarter of a pizza costs $5, it figures that one pizza costs 5 × 4 = $ 20 . This is worked out mathematically by dividing the cost by the amount of pizza: 5 1 4 = 20 Now you can work out how much pizza you get for $8 by doing the same in reverse: dividing $8 by the cost for one whole pizza: 8 20 = 0.4 = 2 5
