UTILITY TOOLS
Percentage Calculator
Calculate percentages, percentage changes, increases, decreases and differences instantly in your browser.
Percentage calculator controls
What is X% of Y?
(X ÷ 100) × Y
X is what percent of Y?
(X ÷ Y) × 100
Percentage increase or decrease
((new − original) ÷ |original|) × 100
Increase or decrease a number
number × (1 ± percentage ÷ 100)
Percentage difference
|A − B| ÷ ((|A| + |B|) ÷ 2) × 100
How to calculate a percentage
Use the calculation that matches your question. WCODX keeps the arithmetic in your browser so you can quickly check everyday percentages, changes and comparisons.
Find a percentage of a number
To find X% of Y, divide X by 100 and multiply the result by Y. This is useful for discounts, tax estimates, tips and proportions.
Percentage increase and decrease
Percentage change compares a new value with an original value. A positive result is an increase; a negative result is a decrease. An original value of zero cannot be used as the baseline for this calculation.
Percentage change vs percentage difference
Percentage change has a defined original value. Percentage difference treats both values equally and compares their absolute difference with their average magnitude.
Common percentage calculations
Use this calculator for discounts, markups, test scores, growth rates, price changes, business comparisons and other general-purpose percentage questions.
Percentage Calculator FAQ
How do I calculate a percentage of a number?
Divide the percentage by 100 and multiply it by the number. For example, 20% of 150 is (20 ÷ 100) × 150 = 30.
How do I find what percentage one number is of another?
Divide the first number by the total number and multiply by 100. The total cannot be zero for this calculation.
How is percentage change calculated?
Percentage change is (new value − original value) ÷ the absolute original value × 100. A positive result is an increase and a negative result is a decrease.
What is the difference between percentage change and percentage difference?
Percentage change compares a new value with an original value. Percentage difference compares two values without treating either one as the starting value.
Does WCODX send my numbers to a server?
No. All calculations run in your browser and the values are not sent to or stored by WCODX.