% Percentage Calculator
Four modes · Instant results · Calculation history
What is X% of Y?
Result = (Percent / 100) × Number
30
20% of 150 = 30
Calculation History
- Your calculations will appear here
Frequently Asked Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage then divide by 100. Example: 20% of 150 = 150 × 20 / 100 = 30. Or simply multiply by the decimal: 150 × 0.20 = 30.
How do I calculate percentage change?
Percentage change = ((New − Old) / Old) × 100. If the result is positive, it's an increase. If negative, it's a decrease. Example: from 80 to 100 = ((100−80)/80) × 100 = 25% increase.
What is X as a percentage of Y?
Divide X by Y, then multiply by 100. Example: 30 is what percent of 150? → (30/150) × 100 = 20%.
How do I convert a percentage to a decimal?
Divide by 100. Example: 75% = 75/100 = 0.75. To convert a decimal back to a percentage, multiply by 100.
How do I find what percent one number is of another?
Use the formula: (Part / Whole) × 100. For example, if you scored 45 out of 60, your percentage is (45/60) × 100 = 75%.