Question

A 12-pack of juice boxes costs $4.32. A case of 20 juice boxes costs $7.80. Which is the best buy?

Explain your reasoning.

Answer 1

$4.32 divided by 12 = 42 cents per juice boxes
$7.80 divided by 20 = 39 cents per juice boxes
The better deal is buying the case if 20 juice boxes because the unit rate per box is lower by 3 cents cheaper per box

Answer 2

$4.32 / 12 = $0.36 (12 pack)

$7.80 / 20 = $0.39 (20 pack)

The 12 pack of juice works out to cost $0.36 per box of juice while the 20 pack of juice works out to cost $0.39 per box of juice therefore, the 12 pack of juice is the best buy as you will pay less per box of juice than you would with the 20 pack of juice