You need 2 pounds of peaches in order to make peach ice cream. You bag of peaches weighs 19 ounces. How many pounds of peaches do you need to purchase?

Question

recall their our 16 ounces in a pound

Answer 1

It takes 16 oz to make 1 pound.  Since you want 2 pounds, you need 2 x 16 oz = 32 oz.  You have only 19 oz.  Therefore you need to purchase 32-19 = 13 ounces.