Math in… Grocery Shopping
When products have the same size, comparing prices is straightforward. If you don’t have a brand preference, one of these soups is a more practical option:
When products have different sizes, price comparison is trickier, but you can find the unit price by dividing the price of a product by its quantity or volume. Many stores save you that arithmetic by putting the unit price next to the price.
We typically expect a larger “economy pack” to be the better deal, but here are a couple counterexamples it didn’t take long to find at a Seattle supermarket:
