1. **Problem:** What is 25% of 320? 2. **Formula:** To find a percentage of a number, use the formula: $$\text{Percentage of a number} = \frac{\text{percentage}}{100} \times \text{number}$$ 3. **Calculation:** $$25\% \text{ of } 320 = \frac{25}{100} \times 320$$ 4. Simplify the fraction: $$\frac{25}{100} = \frac{1}{4}$$ 5. Multiply: $$\frac{1}{4} \times 320 = 80$$ 6. **Answer:** 25% of 320 is **80**. This means if you take 25 parts out of 100 parts of 320, you get 80.