Percentage Calculations Made Easy: A Practical Guide

Percentages are everywhere in daily life - from discounts to tips to test scores. Mastering percentage calculations is an essential skill.

Basic Percentage Calculation

To find what percentage one number is of another:

Percentage = (Part / Whole) × 100

**Example**: What percentage is 25 of 100?

- (25 / 100) × 100 = 25%

Finding a Percentage of a Number

To find a percentage of a number:

Result = (Percentage / 100) × Number

**Example**: What is 20% of 150?

- (20 / 100) × 150 = 30

Percentage Increase

To calculate percentage increase:

Increase % = [(New Value - Old Value) / Old Value] × 100

**Example**: Price increased from $100 to $120

- [(120 - 100) / 100] × 100 = 20% increase

Percentage Decrease

To calculate percentage decrease:

Decrease % = [(Old Value - New Value) / Old Value] × 100

**Example**: Price decreased from $100 to $80

- [(100 - 80) / 100] × 100 = 20% decrease

Common Percentage Applications

1. **Discounts**: Calculate sale prices

2. **Tips**: Determine restaurant tips

3. **Taxes**: Calculate sales tax

4. **Grades**: Convert scores to percentages

5. **Growth**: Track business or investment growth

Tips for Percentage Calculations

1. Convert percentages to decimals for easier calculation

2. Use our percentage calculator for accuracy

3. Double-check your work, especially with money

4. Understand the context (increase vs decrease)

Using Our Percentage Calculator

Our calculator handles:

- Finding percentage of a number

- Calculating percentage increase

- Calculating percentage decrease

- All with instant, accurate results

Conclusion

Percentage calculations don't have to be difficult. With practice and the right tools, you can master them quickly. Use our free percentage calculator whenever you need quick, accurate results.