1. **State the problem:** The Sweater Shack offers a 20% discount on sweaters. The regular price is 15. We need to find the discount amount and the sale price. 2. **Formula for discount amount:** $$\text{Discount Amount} = \text{Regular Price} \times \frac{\text{Discount Percentage}}{100}$$ 3. **Calculate the discount amount:** $$\text{Discount Amount} = 15 \times \frac{20}{100} = 15 \times 0.20 = 3$$ 4. **Formula for sale price:** $$\text{Sale Price} = \text{Regular Price} - \text{Discount Amount}$$ 5. **Calculate the sale price:** $$\text{Sale Price} = 15 - 3 = 12$$ **Final answers:** - Discount Amount: $3 - Sale Price: $12