1. **Problem:** Find the simple interest on 18,500 for 3 years at 7.5%. 2. **Formula:** Simple Interest (SI) is given by $$SI = P \times R \times T$$ where $P$ is the principal, $R$ is the rate per year (in decimal), and $T$ is the time in years. 3. **Calculation:** - Principal $P = 18500$ - Rate $R = 7.5\% = \frac{7.5}{100} = 0.075$ - Time $T = 3$ years 4. Substitute values: $$SI = 18500 \times 0.075 \times 3$$ 5. Multiply step-by-step: $$SI = 18500 \times 0.225$$ 6. Calculate: $$SI = 4162.5$$ 7. **Answer:** The simple interest is **4162.5**.