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Percentage – Most Important Topic for Bank Exams

Quantitative Aptitude – Percentage

Percentage is one of the most important topics in bank exams. Many chapters such as Profit and Loss, Interest, and Data Interpretation depend on percentage concepts. Understanding this topic clearly will improve both speed and accuracy.

Basic Concept

Percentage means “per hundred”.

x% = x / 100

Example: 25% = 25/100 = 1/4

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Important Percentage to Fraction Conversions

• 50% = 1/2
• 25% = 1/4
• 20% = 1/5
• 10% = 1/10
• 12.5% = 1/8
• 33.33% = 1/3

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Important Formulas

• Percentage = (Value / Total) × 100
• Value = (Percentage × Total) / 100
• Increase % = (Increase / Original) × 100
• Decrease % = (Decrease / Original) × 100

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Shortcut Tricks

1. Fast Percentage Calculation

• 10% of a number = divide by 10
• 5% = half of 10%
• 1% = divide by 100

2. Multiplication Trick

Find 20% of 250 = (20/100) × 250 = 50

3. Increase-Decrease Trick

If price increases by 20%, multiply by 1.2 If decreases by 20%, multiply by 0.8

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Practice Questions

Q1. Find 25% of 400
Answer: 100

Q2. Find 20% of 250
Answer: 50

Q3. A number increases from 200 to 240. Find percentage increase.
Answer: 20%

Q4. A price decreases from 500 to 400. Find percentage decrease.
Answer: 20%

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Speed Strategy

• Memorize fraction equivalents
• Use 10% and 1% methods
• Avoid long calculations
• Convert to fractions whenever possible

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Practice Task

1. Find 15% of 200
2. Find 12.5% of 160
3. Increase 300 by 10%

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