Percentages
Percentage is a fundamental topic in quantitative aptitude used in profit & loss, interest, and data interpretation. Strong understanding helps solve many exam questions quickly.
Fundamental Principles
Percentage
A number expressed as a fraction of 100.
Increase Percentage
The percentage increase from original value.
Decrease Percentage
The percentage decrease from original value.
Essential Formulation Tips
- Convert percentages to fractions for quick calculation.
- Memorize common values like 50%, 25%, 20%, 10%.
- Use ratio method for comparison problems.
- Practice regularly to improve speed.
Shortcut Execution Techniques
- x% of y = y% of x.
- Use base 100 method for quick calculation.
- For successive changes: a + b + (ab/100).
- Convert to decimals when needed.
Contextual Inquiries (FAQs)
Q: How to solve percentage questions quickly?
A:
Q: Where are percentages used in exams?
A:
No structural solved cases documented for this level module.
Percentage Practice Questions (Easy to Hard)
Solve percentage MCQs from basic to advanced level for competitive exams.
Q1. What is 10% of 200?
Q2. 50 is what percent of 200?
Q3. What is 25% of 400?
Q4. Increase 200 by 10%. What is the new value?
Q5. Decrease 500 by 20%. What is the result?
Q6. If a number increases from 100 to 120, what is the percentage increase?
Q7. What is 15% of 260?
Q8. A number is decreased by 25% and becomes 75. What is the original number?
Q9. If the price increases by 20% and then decreases by 20%, what is the net change?
Q10. A salary is increased by 10% and then again by 20%. What is total increase?