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How to calculate a percentage

You have two numbers and four possible questions. You will enter them in this tab and copy the line that matches the question. 25% of 200, 25 as a percent of 200, and 200 increased by 25% are three different answers.

6-minute read

Today's result The one line that matches the question: a percent of a number, what percent one number is of another, a number plus a percent, or the percent change from one number to the other.

Open percentage when you can point at the two numbers. A zero in the second box leaves two of the lines as a dash. Nothing is uploaded.

Open Percentage calculator
Contents

  1. Name which question you are answering

    25% of 200 is 50. 25 is 12.5% of 200. 200 plus 25% is 250. The change from 200 to 25 is -87.5%. Copying the wrong line answers a different question.

    25 and 200: 50, 12.5%, 250, and -87.5% are four different answers.
    25 and 200: 50, 12.5%, 250, and -87.5% are four different answers.

  2. Open percentage on cv.cm

    The four lines stay in this tab.

    Open Percentage calculator

  3. Enter the two numbers in order

    The first box is the percent, or the part, or the new number, depending on the line. The second box is the whole, or the starting number. With 25 and 200, the first line is 25% of 200.

  4. Match the line to the question

    Percent of a number uses the first line. What percent one number is of another uses the second. A number plus a percent uses the third. The change from the second number to the first uses the fourth.

  5. A zero whole leaves two lines blank

    You cannot ask what percent something is of zero, and you cannot ask the percent change from zero. The first and third lines still run, because they do not divide by the second number.

    Copy the line that matches the question. A zero whole blanks two lines.
    Copy the line that matches the question. A zero whole blanks two lines.

  6. Copy only the line you named

    The clipboard gets all four lines. Paste the one that matches. 50, 12.5%, 250, and -87.5% must not be swapped.

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FAQ

Can I calculate a percentage free online?

Yes. cv.cm shows four readings of the same two numbers in this tab. Nothing is uploaded.

What is 25% of 200?

50. That is the first line when the boxes are 25 and 200.

What percent is 25 of 200?

12.5%. That is the second line, not the first.

What is 200 increased by 25%?

250. That is the third line. The change from 200 down to 25 is -87.5%, which is the fourth line.

What if the second number is zero?

What-percent and percent-change become a dash. You cannot divide by zero. The other two lines still run.