What is Percentage Calculation?

Percentage calculations involve finding proportions, changes, increases, and decreases expressed as fractions of 100. Our percentage calculator handles various percentage operations with clear explanations and step-by-step solutions.

Types of Percentage Calculations

• Percent of a Number: Find what percentage of a total value
• Percentage Change: Calculate the percentage increase or decrease between two values
• Increase/Decrease by Percentage: Apply a percentage change to a value

How to Use the Percentage Calculator

Select the type of percentage calculation you need, enter the required values, and get instant results with detailed explanations of the calculation method.

Understanding Percentage Change

Percentage change measures the relative difference between an original value and a new value. It's calculated as: ((New Value - Original Value) ÷ |Original Value|) × 100. This gives you the percentage increase or decrease.

Percentage Applications

• Finance: Interest rates, investment returns, discounts
• Business: Profit margins, sales growth, market share
• Statistics: Growth rates, error percentages, survey results
• Everyday Use: Tips, taxes, grade calculations

Percentage Calculation Tips

• Always use the absolute value for percentage change calculations
• Percentage change can be positive (increase) or negative (decrease)
• Be careful with the order of values in change calculations
• Results are rounded to 2 decimal places for readability

Common Percentage Scenarios

Sales Tax Calculation

To find sales tax: multiply the price by the tax rate percentage, then add to the original price.

Discount Calculations

To calculate a discount: multiply the original price by the discount percentage, then subtract from the original price.

Grade Calculations

Convert fractions to percentages by dividing the earned points by total points and multiplying by 100.