📘 BANK EXAM SPEED MATHS – PAGE 4

🔹 Percentage Tricks

Percentage questions are very common in bank exams and are directly or indirectly used in topics like profit & loss, interest, and data interpretation. Using fraction-based shortcuts can save a lot of time.

✅ Trick 1: Convert Percentage to Fraction

Memorize these key conversions:

• 50% = 1/2
• 25% = 1/4
• 20% = 1/5
• 12.5% = 1/8
• 33.33% = 1/3
• 66.66% = 2/3
• 75% = 3/4

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✅ Trick 2: Fast Percentage Calculation

Example: 25% of 480

• 25% = 1/4
• 480 ÷ 4 = 120

Example: 12.5% of 640

• 12.5% = 1/8
• 640 ÷ 8 = 80

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✅ Trick 3: Percentage Increase Shortcut

Example: Increase 200 by 20%

• 20% of 200 = 40
• New Value = 200 + 40 = 240

Shortcut: Multiply directly

200 × 1.2 = 240

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✅ Trick 4: Percentage Decrease Shortcut

Example: Decrease 500 by 10%

• 10% of 500 = 50
• New Value = 500 − 50 = 450

Shortcut: Multiply directly

500 × 0.9 = 450

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🔹 Practice Questions

1. 20% of 750 = ?
2. 33.33% of 900 = ?
3. 12.5% of 320 = ?
4. 75% of 200 = ?
5. Increase 400 by 15% = ?
6. Decrease 800 by 25% = ?

🔹 Exam Tips

✔ Always convert percentages into fractions for faster calculation
✔ Use multiplication shortcuts for increase/decrease problems
✔ Memorize common percentage values to save time in exams

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