Question

What is the unit rate for each size of peanut butter?

Regular: $ ____ per ounce
Family Size: $ _____ per ounce.
Which one is a better buy (claim)?

How do you know (reasoning)?

Answer 1

It would be better to buy the regular size

Explanation:

For regular size You would divide

16/3.36 = 4.7619

For family size you would divide

40/7.60 = 5.2631

As you can see with the regular size you would pay about $4.75 cents for every ounce but if you buy the family size then you would be paying about $5.26 for every ounce