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Data Comparison

Quantitative Aptitude / DI · Mains Data Analysis

Useful for: IBPS Banking

Overview

Data comparison questions compare growth, shares or performance across two or more datasets.

Key points

Absolute change = new − old; percentage change = (new − old)/old × 100.
A larger absolute increase may still be a smaller percentage increase.
Compare shares by converting to percentages of the same total.
Ratios compare two quantities directly.
Average growth over years: total change ÷ number of years (for simple averages).

Explanation

Read whether the question asks absolute or percentage comparison.
Use approximation to rank.
Watch for different base years.
Check units in both datasets.

Step by step

Translate the data or statement into numbers.
Compute step by step with the right formula.
Compare with options; check reasonableness.

Examples

A grows from 100 to 120 (20%); B from 200 to 230 (15%) → A has the higher percentage growth.
B’s absolute increase (30) is larger than A’s (20).
Shares: 45 of 150 = 30% vs 60 of 240 = 25% → first is larger.

Traps and advanced points

Trap: Confusing absolute and percentage change.
Trap: Different bases.
Trap: Ignoring units.

Quick revision

Absolute vs %.
Same base for shares.
Approximate to rank.

Practice MCQs

Values are 234, 182, 190, 160. Find the range (highest − lowest).
1. 81.4
2. 74
3. 66.6
4. 88.8
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Answer: (b) 74. Highest = 234, lowest = 160. Range = 234 − 160 = 74.
Values are 240, 176, 172, 238. Find the range (highest − lowest).
1. 61.2
2. 68
3. 81.6
4. 74.8
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Answer: (b) 68. Highest = 240, lowest = 172. Range = 240 − 172 = 68.
Values are 245, 186, 187, 198. Find the range (highest − lowest).
1. 53.1
2. 70.8
3. 59
4. 64.9
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Answer: (c) 59. Highest = 245, lowest = 186. Range = 245 − 186 = 59.
Values are 251, 180, 169, 276. Find the range (highest − lowest).
1. 128.4
2. 96.3
3. 107
4. 117.7
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Answer: (c) 107. Highest = 276, lowest = 169. Range = 276 − 169 = 107.
Values are 256, 200, 204, 166. Find the range (highest − lowest).
1. 108
2. 81
3. 99
4. 90
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Answer: (d) 90. Highest = 256, lowest = 166. Range = 256 − 166 = 90.

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Notes and questions are written by Kundali IQ for practice. They are not official papers; always check the latest official notification for the syllabus and pattern.