1. **State the problem:** We need to find 3% of 600. 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. **Apply the formula:** Here, the percentage is 3 and the number is 600. $$3\% \text{ of } 600 = \frac{3}{100} \times 600$$ 4. **Calculate:** $$= \frac{3}{100} \times 600 = \cancel{\frac{3}{100}} \times 600 = 3 \times \cancel{6} = 18$$ 5. **Answer:** 3% of 600 is **18**.