Q:

How do I calculate percentages?

A:

Quick Answer

Calculating percentages is a key concept in mathematics. Percentage calculations are important in all forms of mathematics including algebra, geometry and calculus. They're also utilized in many sciences such as chemistry, physics and biology.

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How do I calculate percentages?
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Full Answer

  1. Determine your variables

    Determine which numbers are your part and your whole. Your whole number is the number that equals 100 percent. The part is the number that you're trying to find how many percents of the whole number it takes up.

  2. Divide the part into the whole

    Divide the part number variable into the whole number variable to obtain a decimal.

  3. Multiply by 100

    Multiply your decimal by 100 to convert the decimal into a percentage. Add a percent sign.

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Related Questions

  • Q:

    What is the way to multiply percentages?

    A:

    The multiplication of percentages is accomplished by converting the percentage to decimals, and multiplying the decimals. To convert a percentage to a decimal, the percent sign must be removed, and the number divided by 100. The decimal point should always be moved two places to the left when dividing by 100. After dividing 75 by 100, the answer is 0.75.

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  • Q:

    How do you work out percentages without a calculator?

    A:

    A calculator is always helpful when determining percentages, but you can easily compute percentages without a calculator. A pencil and paper might be helpful as you do this.

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  • Q:

    Who invented percentages?

    A:

    No one person invented percentages. The concept developed throughout history. In Ancient Rome mathematical computation were expressed in fractions of 100. This concept later evolved into percentages.

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  • Q:

    What is simple way kids can figure out percentages?

    A:

    Some simple way kids can figure out percentages are to relate basic fraction with percentages or use grid paper. Grid paper that is 10 by10 is useful for teaching younger students that a percentage is given as parts per 100. For example, using grid paper or sheet, teachers can show that 10 percent is 10 squares on the grid sheet that contain 100 squares, or 10 per 100; once students master finding percentages with this technique, they can move on to equating basic percentages like 10 percent, 25 percent and 50 percent with their corresponding fractions.

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