How to Calculate the Percentage of Another Number

Stores often describe discounts in terms of percentages.
••• Martin Poole/Photodisc/Getty Images

Percentages are one of several ways of describing quantities' relationships to one another. Specifying one number as a percentage of another means specifying the fraction of the second quantity the first comprises. The percentage value is the number that, divided by 100, equals that fraction. To express the percentage as a whole number, round it accordingly. Some applications, however, don't require percentages as exact whole figures.

    Divide the first number the second. For instance, if you want to find what percentage 43 is out of 57, divide 43 by 57 to get 0.754386.

    Multiply the result by 100 -- 0.754386 x 100 = 75.4386.

    Round the result. To produce a whole number, round it to two significant figures, stating that, with this example, 43 is 75 percent of 57. To provide a slightly more accurate answer, round it to two decimal places, stating that 43 is 75.44 percent of 57.

Related Articles

How to Calculate Population Ratios
How to Use Significant Figures in Addition and Subtraction
How to Know When One Fraction Is Larger Than Another...
Characteristics of Aquatic Plants
How to Find the Answer to 20% of What Number Is 8?
How to Compare Ratios
How to Calculate Percent Agreement Between Two Numbers
How to Calculate a Percentage and Solve Percent Problems
How to Find Mass Percentage
How to Subtract Percentages
How to Figure a Percentage of a Whole Number
How to Figure Survey Percentages
How do I Calculate 0.1%?
How to Convert .06 to Percentage
How to Convert 12 Volt Alternator to 120 Volts
How to Increase a Number by a Percentage
How to Dissolve Magnesium Chloride
What is the Identity Property of Multiplication?
How to Calculate Statistical Mean
302 Vs. 304 Stainless Steel

Dont Go!

We Have More Great Sciencing Articles!