Use Cent to help you with calculations involving percentages. Users can customize it by choosing the number of decimals and whether or not to show thousands separators.

Here's all the questions it can answer:

• What is X% of Y?
• The value X is what percentage of Y?
• What is the percentage increase from X to Y?
• What is the percentage decrease from X to Y?
• If X increases by Y, what is the final value?
• If X decreases by Y, what is the final value?
• If an initial value increased by X% is Y, what is the initial value?
• If an initial value decreased by X% is Y, what is the initial value?