Trail mix is sold in 1-pound bags. mary will buy some trail mix and repacked it so that each of the 15 members of her hiking club gets one 2/5 pound bag. how many one pound trail mix should marry buy to have enough trail mix without leftovers?

Okay. so we need 15 2/5 pound bags. We'll calculate how many pounds that actually comes to. Our problem is 15x2/5. Using cross simplification, our problem becomes 3x2. 3x2=6. We need 6 pounds. That means that we must have 6 1-pound bags to fit with no leftovers.