As a review from the lesson
on calculating unit prices, we must divide the cost of the item by the
number of units of measure.
Now we can compare unit prices of two
or more products.
Which is the better buy?
A 24 oz box of cereal for $3.69 or a 36 oz box of cereal for
$4.89?
We must solve two division
problems...
$3.69
÷ 24 ≈ $0.15
$4.89
÷ 36 ≈ $0.14 
Which is the better buy?
A 18 oz jar of jam that costs $1.99 or a 24 oz jar of jam that
costs $2.29?
$1.99
÷ 18 ≈ $0.11
$2.29
÷ 24 ≈ $0.10 
Often
it is necessary to use 0.5¢ when
comparing unit prices, especially when the unit prices are
similar ($0.12 vs. $0.125). Sometimes a half cent makes
the difference in a bargain! 
Let's
practice comparing unit prices.
