Percentage Calculator
Calculate percentages quickly and easily. Find a percentage of a number, determine what percentage one number is of another, or calculate percentage increase and decrease.
How to Use
Choose the percentage calculation you want to perform.
Enter the required numbers in the fields provided.
Click Calculate Percentage.
View your result instantly.
Try another calculation whenever you need it.
Choose a calculation below and enter your numbers to calculate percentages instantly.
Percentage Calculator
What Do These Results Mean?
Percentage of a Number
Calculates a percentage of a number. For example, 20% of 200 is 40.
One Number as a Percentage of Another
Shows what percentage one number represents of another. For example, 50 is 25% of 200.
Percentage Increase
Shows how much a value has increased as a percentage of its original value. For example, increasing from 100 to 120 is a 20% increase.
Percentage Decrease
Shows how much a value has decreased as a percentage of its original value. For example, decreasing from 100 to 80 is a 20% decrease.
Example Calculation
This example demonstrates how the Percentage Calculator works using sample figures. Choose the calculation type that matches what you want to find, then enter your own numbers.
Example
Example 1 — What is X% of Y?
Suppose you want to calculate 20% of 200.
Calculation
20 ÷ 100 × 200 = 40
Result: 40
Example 2 — X is what percentage of Y?
Suppose you want to know what percentage 50 is of 200.
Calculation
50 ÷ 200 × 100 = 25%
Result: 25%
Example 3 — Percentage Increase or Decrease
Suppose a value increases from 100 to 120.
Calculation
(120 − 100) ÷ 100 × 100 = 20%
Result: 20% increase
You can also mention briefly:
If the value falls from 100 to 80, the result would be a 20% decrease.
Calculation Formula
How is the discount calculated?
The Percentage Calculator uses different formulas depending on the type of percentage calculation you select.
Percentage of a Number Formula
Result = (Percentage ÷ 100) × Number
For example:
(20 ÷ 100) × 200 = 40
One Number as a Percentage of Another Formula
Percentage = (First Number ÷ Second Number) × 100
For example:
(50 ÷ 200) × 100 = 25%
Percentage Change Formula
Percentage Change = ((New Value − Original Value) ÷ Original Value) × 100
A positive result represents a percentage increase, while a negative result represents a percentage decrease.
What each term means
Percentage
The proportion of a number expressed out of 100.
First Number
The value you want to express as a percentage of another number.
Second Number
The value used as the reference or total when calculating what percentage the first number represents.
Original Value
The starting value before an increase or decrease.
New Value
The value after the change has occurred.
Frequently Asked Questions
How do I calculate a discount?
What is a percentage?
A percentage represents a number or proportion out of 100. For example, 25% means 25 out of every 100, or one quarter of the total.
How do I calculate a percentage of a number?
Divide the percentage by 100 and multiply the result by the number. For example, 20% of 200 is calculated as (20 ÷ 100) × 200 = 40.
How do I calculate percentage increase or decrease?
Subtract the original value from the new value, divide the difference by the original value, and multiply by 100. If the result represents an increase, it is a percentage increase; if the value has fallen, it is a percentage decrease.
What is the difference between percentage and percentage change?
A percentage expresses one value as a proportion of another or calculates a portion of a number. Percentage change measures how much a value has increased or decreased compared with its original value.
Disclaimer
The results provided by this Percentage Calculator are for informational and educational purposes only. They are based on the numbers you enter and should not be considered financial, accounting, tax, legal, or professional advice.
While the calculator is designed to provide accurate percentage calculations, results may be affected by rounding or the accuracy of the values entered.
Always verify important calculations before using the results for financial, business, academic, or other significant decisions.