Percentage Calculator
Calculate percentages quickly and easily with our free online calculator. Perfect for students, professionals, and everyday calculations.
Basic Percentage Calculation
Find what percent one number is of another.
Find Percentage of Number
Calculate what is X% of a given number.
Percentage Change Calculator
Calculate the percentage increase or decrease between two numbers.
Percentage Calculation Examples
Finding a Percentage
To find what percentage 25 is of 100:
Step 1: Divide 25 by 100 = 0.25
Step 2: Multiply by 100 = 25%
Result: 25 is 25% of 100
Finding a Percentage of a Number
To find 15% of 80:
Step 1: Convert 15% to decimal: 15% = 0.15
Step 2: Multiply 80 by 0.15 = 12
Result: 15% of 80 is 12
Calculating Percentage Change
To find the percentage increase from 50 to 70:
Step 1: Calculate the difference: 70 - 50 = 20
Step 2: Divide by the original value: 20 ÷ 50 = 0.4
Step 3: Multiply by 100: 0.4 × 100 = 40%
Result: The percentage increase from 50 to 70 is 40%
Frequently Asked Questions
How do I calculate a percentage?
To calculate what percentage one number is of another, divide the first number by the second, then multiply by 100. For example, to find what percentage 15 is of 60: (15 ÷ 60) × 100 = 25%.
How do I calculate percentage increase or decrease?
To calculate percentage change, subtract the original value from the new value, then divide by the original value and multiply by 100. If the result is positive, it's a percentage increase; if negative, it's a decrease. Formula: ((New - Original) ÷ Original) × 100.
How do I find a number if I know the percentage?
If you know that a value is a certain percentage of another number, you can find the original number by dividing the value by the percentage (as a decimal). For example, if 30 is 25% of some number X, then X = 30 ÷ 0.25 = 120.
How do I add a percentage to a number?
To add a percentage to a number, multiply the number by (1 + percentage/100). For example, to add 20% to 50: 50 × (1 + 20/100) = 50 × 1.2 = 60.
How do I calculate discounts using percentages?
To calculate a discounted price, multiply the original price by (1 - discount percentage/100). For example, a 30% discount on a $100 item would be: $100 × (1 - 30/100) = $100 × 0.7 = $70.
Why Use Our Percentage Calculator?
Our online percentage calculator offers a simple and efficient way to perform percentage calculations for various purposes. Whether you're a student working on math homework, a professional analyzing financial data, or someone calculating discounts while shopping, our calculator provides accurate results instantly.
Benefits of Using Our Calculator:
- Easy to use interface designed for all skill levels
- Multiple calculation types in one convenient tool
- Instant results with step-by-step examples
- Mobile-friendly design works on all devices
- Free to use with no registration required
- Option to save your results as PDF or image