The 29-oz can has the lower cost per ounce.
Work Step by Step
When you divide $0.89$ by $15$, you get approximately $0.059$ The 15-oz can costs approximately 0.059 cents per ounce. When you divide $1.69$ by $29$, you get approximately $0.058$ The 29-oz can costs approximately 0.058 cents per ounce. The 29-oz can costs less per-ounce than the 15-oz can.