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# How do I work out percentages on a calculator?

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To determine a percentage, divide the actual number by the total possible number, and multiply the result by 100. For example, if four out of five doctors agree on something, enter the equation in a calculator as "4 ÷ 5 x 100." The result, 80, is the percentage.

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Percent literally means per hundred and is used to express what the numerator on a fraction would be if the denominator were equal to 100. By using the common denominator of 100, it becomes simpler to use fractions in calculations because the common number system is based on multiples of 10. This method of calculation allows for the simple movement of the decimal point rather than painstaking division.

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## Related Questions

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Existing studies cannot determine the percentage of premeditated versus impulsive murders. While this is in part a reflection of the difficulty in discerning the intentions of a given criminal, there are marked differences in brain function and intellectual ability demonstrated by the murderers committing these crimes.

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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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Online withholding calculators are available on many payroll and tax service websites, including ADP, TurboTax and Kiplinger. The Internal Revenue Service also provides a withholding calculator on the official IRS website, as of 2015. These calculators assist taxpayers when filling out the Form W-4, Employee's Withholding Allowance Certificate.