A supermarket had bags of red grapes for $8.55 for 3. The also had bags of
green grapés priced at $11.64 for 4. Which type of grape is most expensive?
Find out the unit price (divide the total cost by the number of bags)
Red grapes
8.55/3=$2.85 per bag
Green grapes
11.64/4=$2.91 per bag
compare
2.91 > 2.35
therefore
green grapes is most expensive