Worked Example
Revision challenge 9
For Class 7 Mathematics, explain or solve a percentage question from the chapter "Comparing Quantities". Focus on revision challenge and show the working clearly.
Step-by-step solution path
- Read the topic idea: Percentage.
- Recall the core explanation from the chapter: Ratios, percentages, profit-loss, simple interest — practical everyday math.
- Use the related formula "Simple Interest" as the main tool while solving.
- Write the reasoning in simple school-level language before the final answer.
Final learning answer
This example is centred on Percentage. A strong solution should identify the correct data, apply Simple Interest, and explain each transition instead of jumping directly to the answer.
Related formula
Simple Interest
SI = P × R × T / 100