Percentage Calculator — Three Ways to Calculate Percentages
Calculate any type of percentage problem instantly: find a percentage, find what percent a number is, or calculate percentage change.
What is 25% of 200?
25% of 200 =
50
Three Types of Percentage Calculations
Find X% of Y
Result = (X / 100) x Y
e.g. 25% of 200 = 50
X is what % of Y
Result = (X / Y) x 100
e.g. 50 is 25% of 200
% Change from X to Y
Result = ((Y - X) / X) x 100
e.g. 100 to 150 = +50% change
Common Percentage Uses
Percentages appear everywhere in daily life: discounts and sales ("30% off"), tax calculations (GST at 18%), interest rates, exam scores, growth metrics, and statistical data. Understanding how to quickly calculate percentages is an essential everyday math skill.
In business and finance, percentage change is used to track growth, measure performance, and compare data across time periods. Revenue growth, stock price changes, inflation rates, and salary hikes are all commonly expressed as percentage changes from a baseline.
For shopping, use Mode 1 to find discount amounts. To calculate how much GST is included in a price, use Mode 2. For tracking year-on-year changes in salary, investments, or prices, use Mode 3 to find the percentage change.
Frequently Asked Questions
How do I calculate what percentage one number is of another?
Divide the first number by the second number and multiply by 100. For example, 25 is 50% of 50 because (25 / 50) x 100 = 50%.
How do I calculate percentage change?
Subtract the original value from the new value, divide by the original value, and multiply by 100. A positive result means an increase, negative means a decrease.
What is the difference between percentage and percentile?
Percentage is a ratio expressed as parts per hundred. Percentile is a value below which a given percentage of observations fall in a dataset. They measure very different things.