Percentage Calculator Tool
What is
% of
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is what % of
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Percentage change from
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Frequently Asked Questions
How do I calculate a percentage of a number?
To find X% of Y, you convert the percentage X to a decimal (by dividing by 100) and then multiply it by Y. For example, 20% of 150 is (20/100) * 150 = 0.20 * 150 = 30.
How do I find what percentage X is of Y?
To find what percentage X is of Y, you divide X by Y and then multiply the result by 100. For example, to find what percentage 30 is of 150, you calculate (30 / 150) * 100 = 0.20 * 100 = 20%.
How is percentage increase or decrease calculated?
First, find the difference between the new value and the old value. Then, divide this difference by the absolute old value. Finally, multiply by 100. If the result is positive, it's an increase; if negative, it's a decrease.
Does this calculator handle decimal inputs?
Yes, you can use decimal numbers in all input fields. The results are typically rounded to two decimal places for clarity.
