Calculate percentages quickly and easily. Find a percentage of a number, work out percentage change, or calculate percentage increases and decreases.
15% of 200 is
30A percentage is a way of expressing a number as a fraction of 100. The word comes from the Latin "per centum", meaning "by the hundred". Percentages are used everywhere in daily life, from shop discounts and tax rates to exam scores and interest rates. This Percentage Calculator on Calculator Site is designed to make these calculations straightforward.
To convert a percentage to a decimal, you simply divide by 100. For example, 25% becomes 0.25. To convert a decimal back to a percentage, you multiply by 100, so 0.75 becomes 75%. You can explore this relationship with our Decimal to Fraction Calculator.
Percentage Points vs. Percentage Change
A common point of confusion is the difference between an increase in percentage points and a percentage change. If a savings account interest rate increases from 2% to 3%, it has risen by 1 percentage point. However, the percentage change is a 50% increase ((3-2)/2 * 100). This is a critical distinction in finance.
Here are three of the most frequently used percentage calculations that you can also perform with our tool. For more
X% of Y
(X / 100) * Y
X is what % of Y
(X / Y) * 100
% Change
((New - Old) / Old) * 100
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