1. The problem asks to find 2.5% of 3,400. 2. To find a percentage of a number, use the formula: $$\text{Percentage of a number} = \frac{\text{percentage}}{100} \times \text{number}$$ 3. Substitute the values: $$\frac{2.5}{100} \times 3400$$ 4. Simplify the fraction: $$\frac{2.5}{100} = \frac{\cancel{2.5}}{\cancel{100}} = 0.025$$ 5. Multiply: $$0.025 \times 3400 = 85$$ 6. Therefore, 2.5% of 3,400 is 85.