1. **State the problem:** Ahmad's chocolate bar is 74% cocoa, and the total weight is 69 grams. We need to find how many grams of cocoa it contains, rounded to the nearest tenth. 2. **Formula used:** To find the amount of cocoa, use the formula: $$\text{grams of cocoa} = \frac{\text{percentage}}{100} \times \text{total weight}$$ 3. **Apply the formula:** $$\text{grams of cocoa} = \frac{74}{100} \times 69$$ 4. **Calculate:** $$= 0.74 \times 69$$ 5. **Multiply:** $$= 51.06$$ 6. **Round to the nearest tenth:** $$51.1$$ **Final answer:** Ahmad's chocolate bar contains **51.1 grams** of cocoa.