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How to calculate percentage without a calculator

Updated February 21, 2019

Calculating percentage without a calculator is something that everyone should know how to do. Being able to calculate percentages can help you figure tips, budget money or even figure out sports statistics. Calculators have become a popular tool and make calculations quicker, but even without a calculator there are a few easy steps to figure out the percentage of anything.

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  1. Convert the percentage number that you are looking for into a decimal form by moving the decimal point over two places to the left. For example, if you are looking for 10 per cent of a number, you will move the decimal over two places to the left and the decimal form would be .10.

  2. Multiply the original number by the decimal form of the percentage number. For example, if you are trying to determine 10 per cent of 25, you will multiply the original number, 25, by the decimal form of 10 per cent which is .10. This will give you 2.5, which is 10 per cent of 25.

  3. Check your work by multiplying your final answer by the percentage for which you were looking. For instance, if you were looking for 10 per cent of 25, your answer would be 2.5. You can check this by multiplying 2.5 times 10, which gives you the original number of 25.

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About the Author

Timothy Onkst

Based in Harker Heights, Texas, Timothy Onkst has been writing about sports, fitness and health since 2003. His articles have appeared in a variety of publications including "Texas Roundball" magazine, Yahoo Sports, Fox Sports and other websites.

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