Percentage Calculator
Pick the mode you need and enter two numbers. The calculator shows the result and the formula it used, so you can double-check the math.
Result
40
20% of 200 is 40.
Formula: Y × (X ÷ 100)
Related tools
About this calculator
The six modes
What is X% of Y: multiply Y by X ÷ 100. Handy for tips and discounts.
X is what percent of Y: divide X by Y and multiply by 100.
Percentage increase and decrease: compare a starting value with an ending value to express the change as a percent.
Add and remove percent: adding multiplies by (1 + p ÷ 100); removing divides by (1 + p ÷ 100), which is the correct move when the percentage is already baked into the total.
Example
15% of $60 is $9. If $60 rose to $75, that is a 25% increase. And if $75 already includes 15%, the value before that percentage was $65.22 — not $63.75.
Important limitations
- Removing a percentage is not the same as subtracting it: you divide, not subtract.
- Results are rounded to two decimals.
- For Puerto Rico sales tax use the IVU calculator, which already has the rate configured.
Learn more
Guides explaining the context behind this calculation.
Frequently asked questions
This calculation runs in your browser and is never sent to a server. Your last values may be saved on your device only, for convenience. Results are estimates and are not financial, tax, accounting or legal advice.