Percentage

Percent of a number, what percent, or percent change.

How to use Percentage

Percentage — Calculate a percent of a number, what percent one number is of another, or the percent change. Free to use in D2i DevTools — no account required.

Steps

Choose Calculation. It starts on percent of a number.
Fill in A (percent, part, or start). This field is required.
Fill in B (number, whole, or end). This field is required.
Click Run and copy the result under the form.

Frequently asked questions

What is Percentage used for?

Use it for a discount, a share of a total, or how much a value grew.

How do I use the free online Percentage tool?

Choose Calculation. It starts on percent of a number. Fill in A (percent, part, or start). This field is required. Fill in B (number, whole, or end). This field is required. Click Run and copy the result under the form.

What can I paste or upload into Percentage?

Choose the calculation. A is the percent, the part, or the starting number. B is the number, the whole, or the ending number.

What output does Percentage give me?

One line with the result. Percent-of returns a number. The other two modes return a percent.

Is Percentage free, and is my input private?

Yes — Your input is processed in memory for this request only. It is not saved to disk or the database, and it is cleared after the tool finishes.

What does percent change use?

It is (B − A) / A × 100. A is the start and B is the end. A start of zero returns an error.

Inputs are processed in memory only and are not saved to disk or the database. Data exists only for the duration of your request.