Q:

# How do you work out percentages without a calculator?

A:

### Quick Answer

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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1. ### Make the percentage a fraction

Determine what the percentage you are trying to find would be. For example, if you wanted to calculate 33 percent of a number, you would use the fraction 1/3.

2. ### Divide the number you are trying to find the percentage of by the denominator

Take the number you want to find the percentage of (for this example, assume it is 21) and divide it by the denominator, which is the bottom number of the fraction.

3. ### Determine the answer

Divide 21 by 3 and you find that the answer is 7. This model works any time you want to find the percentage of a number.

4. ### Check your answer

Take the answer that you calculated and multiply it by the denominator. The answer you receive should be the number for which you were originally trying to find the percentage. In this example, multiplying the denominator of 3 by the answer you calculated, which was 7 verifies that the answer is correct because the result is the original number of 21.

Learn more about Fractions & Percentages
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## Related Questions

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A percentage can be solved by multiplying a given quantity by a percent. It should be noted, however, that the percent should first be divided by the numeral 100 before doing the multiplication.

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To add a percentage to a given number involves multiplying the base number by a decimal that represents the percentage fraction. Adding two percentages together involves the opposite, or converting the percentages to fractions.

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• A:

To calculate a weighted percentage, first multiply each item by the percentage it has been allotted, and then add those values together. Weighted percentages help in situations where certain factors are more important than others.

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• A:

Converting the percentages to decimals then finding the average of these figures and reconverting back to a percentage is the easiest way to do this. You need the percentages you wish to average, paper, a pencil and a calculator.

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