1. **State the problem:** We need to find how much more the heaviest package weighs than the lightest package based on the given weights: 1 pound, 1 1/2 pounds, and 2 pounds. 2. **Identify the lightest and heaviest weights:** From the data, the lightest package weighs 1 pound and the heaviest package weighs 2 pounds. 3. **Calculate the difference:** The difference in weight is given by the formula: $$\text{Difference} = \text{Heaviest weight} - \text{Lightest weight}$$ 4. **Substitute the values:** $$\text{Difference} = 2 - 1 = 1$$ 5. **Interpret the result:** The heaviest package weighs 1 pound more than the lightest package. **Final answer:** The heaviest package weighs **1** pound more than the lightest package.