Percentage Change
Used for year-on-year growth analysis.
[(New - Old) / Old] * 100
Quantitative Aptitude
Analyze bar charts, pie charts, line graphs, and matrix tables. Compute percentages, ratios, growth rates, and CAGRs quickly.
Data interpretation presents information visually — pie charts, bar charts, line graphs or tables — and asks you to pull out percentages, ratios, shares, growth rates and averages from it. Speed comes from reading the right number once, from knowing the few formulas (share of total, percentage change, CAGR), and from avoiding the two classic traps: misreading axes/units and confusing percentage points with percentage change.
Most DI questions ask about percentages, ratios, and averages from a table/chart.
Used for year-on-year growth analysis.
Convert percentages or values into sector angles.
The recurring question patterns in this topic — know the shape of each pattern before you solve.
Read a value straight off the chart or table.
Product B sales in 2023 from the stacked bars.
A part divided by the total.
50 units of a 130-unit stack → 38.46%.
Compare two consecutive years or periods.
2019 → 2023 sales growth ≈ 92.3%.
Divide one series value by another.
Product A : Product C in 2022 = 20 : 9.
Mean of series values or compounded growth across years.
CAGR of Product A ≈ 18.9% over 4 years.
High-signal questions with full solution flow across difficulty patterns.
Classic exam problems worth internalizing — each one ships a complete step-by-step solution.
Round numbers to the nearest 5 or 10. Avoid precise calculations unless options are very close.
Where most students lose marks — review these before you sit the test.
You have mastered the theory. Now put it under pressure with a focused topic test and instant explanations.
Take Data Interpretation Test