Question

a 12 oz bag of toll house chocolate chips costs $3.60 a 20 oz bag of Hershey chocolate chips costs $4.40 which size is better buy

Answer 1

3.60/12=.3
4.4/20=.22 
Therefore the toll house chocolate chips is a better buy

Answer 2

The 20 oz bag of Hershey chocolate chip that costs $4.40.  Per oz it is $0.22. The 12 oz bag that costs $3.60 costs $0.30.

Hope that helps!