1. The problem is to find the percentage of a given number. 2. The formula to find the percentage is: $$\text{Percentage} = \left(\frac{\text{Part}}{\text{Whole}}\right) \times 100$$ 3. Important rules: - The "Part" is the portion or amount you want to find the percentage of. - The "Whole" is the total or maximum amount. - Multiply by 100 to convert the fraction to a percentage. 4. Example: If you want to find what percentage 25 is of 200: $$\text{Percentage} = \left(\frac{25}{200}\right) \times 100 = 0.125 \times 100 = 12.5\%$$ 5. So, 25 is 12.5% of 200. This method works for any values of part and whole to find the percentage.