How to Calculate Percentages: Complete Guide with Examples

Percentages are everywhere - from shopping discounts to exam scores, tips to taxes. Understanding how to calculate percentages is an essential life skill.

What is a Percentage?

A percentage is a number expressed as a fraction of 100. The word "percent" literally means "per hundred."

25% = 25/100 = 0.25

Common Percentage Calculations

1. Finding a Percentage of a Number

Formula: (Percentage × Number) ÷ 100

Example: What is 20% of 150?

2. Finding What Percentage One Number is of Another

Formula: (Part ÷ Whole) × 100

Example: 30 is what percent of 150?

3. Percentage Increase/Decrease

Formula: ((New - Original) ÷ Original) × 100

Example: Price increased from $100 to $125

Real-World Percentage Examples

Shopping Discounts

Restaurant Tips

Exam Scores

Quick Percentage Tricks

- 50% = Divide by 2

- 25% = Divide by 4

- 10% = Move decimal one place left

- 1% = Move decimal two places left

Calculate Percentages Instantly

Our Percentage Calculator handles all types of calculations:

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Conclusion

Percentages don't have to be confusing. Use our free Percentage Calculator for instant, accurate results!