Percentage Calculator
Calculate percentages, percent changes, and more with ease
Understanding Percentages
A percentage is a way to express a number as a fraction of 100. The symbol % means "per hundred" or "out of 100".
Formula:
Percentage = (Part / Whole) × 100
For example: If you scored 45 out of 60 points, your percentage is (45 ÷ 60) × 100 = 75%
Real-World Examples
Sales Tax
What is 8% of $250?
Calculation: 250 × (8 ÷ 100) = $20
Answer: $20 tax
Test Score
45 is what % of 60?
Calculation: (45 ÷ 60) × 100 = 75%
Answer: 75% score
Discount
What is 25% of $80?
Calculation: 80 × (25 ÷ 100) = $20
Answer: $20 off, pay $60
Growth
% change from 100 to 150
Calculation: ((150-100) ÷ 100) × 100 = 50%
Answer: 50% increase
Visual Representation
25%1/4 of the total
50%1/2 of the total
75%3/4 of the total
100%The complete total
Common Use Cases
Finance
- • Interest rates
- • Tax calculations
- • Investment returns
- • Loan payments
Shopping
- • Discounts & sales
- • Price comparisons
- • Tip calculations
- • Coupon values
Education
- • Test scores
- • Grade percentages
- • Attendance rates
- • Success metrics
Quick Reference Table
| Percentage | Decimal | Fraction | Example (of 100) |
|---|---|---|---|
| 10% | 0.10 | 1/10 | 10 |
| 20% | 0.20 | 1/5 | 20 |
| 25% | 0.25 | 1/4 | 25 |
| 33.33% | 0.3333 | 1/3 | 33.33 |
| 50% | 0.50 | 1/2 | 50 |
| 75% | 0.75 | 3/4 | 75 |
| 100% | 1.00 | 1/1 | 100 |