1. The problem asks: What percentage is 3 of 12? 2. To find what percentage one number is of another, use the formula: $$\text{Percentage} = \left(\frac{\text{Part}}{\text{Whole}}\right) \times 100$$ 3. Here, the "Part" is 3 and the "Whole" is 12. 4. Substitute the values into the formula: $$\text{Percentage} = \left(\frac{3}{12}\right) \times 100$$ 5. Simplify the fraction: $$\frac{3}{12} = \frac{1}{4}$$ 6. Multiply by 100: $$\frac{1}{4} \times 100 = 25$$ 7. Therefore, 3 is 25% of 12. This confirms the answer is 25%.