Percentage Calculator USA
Calculate Percentages with Ease
Solve percentage problems, calculate increases/decreases, and find differences between values
Basic Percentage
Percentage Increase
Percentage Decrease
Percentage Difference
Basic Percentage Calculator
Calculate the percentage of a value or find the value given a percentage.
Percentage Increase Calculator
Calculate the percentage increase from one value to another.
Percentage Decrease Calculator
Calculate the percentage decrease from one value to another.
Percentage Difference Calculator
Calculate the percentage difference between two values.
Result
30
Calculation
15% of 200 = 30
Formula
(15/100) × 200
What is a Percentage?
A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign “%”. For example, 45% is equal to 45/100, or 0.45.
Percentage Formula
The basic percentage formula is:
P × V1 = V2
Where:
- P is the percentage
- V1 is the first value that the percentage will modify
- V2 is the result of the percentage operating on V1
Common Percentage Calculations
- Percentage of a value: What is X% of Y?
- Percentage increase: How much did a value increase from X to Y?
- Percentage decrease: How much did a value decrease from X to Y?
- Percentage difference: What is the percentage difference between X and Y?
- Percentage change: What is the percentage change from X to Y?
Real-World Applications
- Calculating sales tax and discounts
- Determining tip amounts
- Analyzing financial growth or decline
- Measuring performance improvements
- Comparing statistical data
Frequently Asked Questions
How do I calculate a percentage?
To calculate a percentage, divide the part by the whole and multiply by 100. For example, to find what percentage 25 is of 100, you would calculate (25/100) × 100 = 25%.
What is the difference between percentage increase and percentage difference?
Percentage increase measures how much a value has grown from an original amount, while percentage difference compares two values without considering which one is original or new.
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 15% to 200: 200 × (1 + 15/100) = 200 × 1.15 = 230.
How do I subtract a percentage from a number?
To subtract a percentage from a number, multiply the number by (1 – percentage/100). For example, to subtract 15% from 200: 200 × (1 – 15/100) = 200 × 0.85 = 170.