Question: 3 Broadroad Primary School has 800 students. 15% of the students walk to school. How many students walk to school?
1. **State the problem:** We need to find how many students walk to school if 15% of 800 students walk.
2. **Formula:** To find a percentage of a number, use the formula:
$$\text{Part} = \text{Total} \times \frac{\text{Percentage}}{100}$$
3. **Apply the formula:** Here, Total = $800$ and Percentage = $15$.
$$\text{Number of students walking} = 800 \times \frac{15}{100}$$
4. **Simplify the fraction:**
$$\frac{15}{100} = \frac{3 \times 5}{20 \times 5} = \frac{3}{20}$$
5. **Calculate:**
$$800 \times \frac{3}{20} = \cancel{800}^{{\div 20}=40} \times 3 = 40 \times 3 = 120$$
6. **Interpretation:** So, $120$ students walk to school.
**Final answer:** $120$ students walk to school.