Always read the title and column headers first
2. Identify what each row and column represents
3. Check for units mentioned (lakhs, crores, percentage, etc.)
4. Look for missing data or symbols like '-' or '*'
5.
Understand the time period covered
Common Question Types:
• Finding totals, averages, and percentages
• Comparison between years/categories
• Growth rate calculations
• Ratio and proportion problems
• Maximum/minimum value identification
Key Formulas:
Percentage increase = [(New Value - Old Value) / Old Value] × 100
Average = Sum of all values / Number of values
Ratio = First value : Second value (in simplest form)
Shortcut 1 - Quick Percentage Calculation:
To find X% of Y, use: X × Y ÷ 100
For 25%: Divide by 4
For 20%: Divide by 5
For 12.5%: Divide by 8
Shortcut 2 - Average Estimation:
When finding average of 5-6 numbers, pick a round number close to all values. Calculate differences and adjust