1. The problem: How to find the percentage of a number. 2. Formula: The percentage of a number is found using the formula $$\text{Percentage} = \left(\frac{\text{Part}}{\text{Whole}}\right) \times 100$$. 3. Explanation: The "Part" is the portion or amount you want to find the percentage of, and the "Whole" is the total or maximum amount. 4. Example question: If you scored 45 marks out of 60 in a test, what is your percentage score? 5. Solution steps: - Step 1: Identify the part and whole. Here, part = 45 and whole = 60. - Step 2: Apply the formula: $$\text{Percentage} = \left(\frac{45}{60}\right) \times 100$$. - Step 3: Calculate the fraction: $$\frac{45}{60} = 0.75$$. - Step 4: Multiply by 100: $$0.75 \times 100 = 75$$. 6. Final answer: Your percentage score is 75%.