1. **State the problem:** Amari bought sneakers for 110 dollars and sold them after a month for 10% less than the original price. 2. **Formula used:** To find the selling price after a percentage decrease, use: $$\text{Selling Price} = \text{Original Price} \times (1 - \text{Percentage Decrease})$$ 3. **Apply the values:** The original price is 110 and the percentage decrease is 10%, or 0.10 in decimal form. 4. **Calculate the selling price:** $$\text{Selling Price} = 110 \times (1 - 0.10) = 110 \times 0.90$$ 5. **Multiply:** $$110 \times 0.90 = 99$$ 6. **Interpretation:** Amari sold the sneakers for 99 dollars. 7. **Labeling the original price on the number line:** The original price is 110 dollars, which corresponds to 100% on the percentage scale. So, the point labeled 110 on the top number line aligns with 100% on the bottom percentage line.