Changing Common Fractions and Whole Numbers to Percent

Mathematics Volume 1 of 2
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Review of Introductory Mathematics PERCENTAGES Example: Change 2.7 to percent. 2.7 x 100 = 270% Changing Common Fractions and Whole Numbers to Percent When changing common fractions to percent, convert the fraction to a decimal, then multiply by 100 and add the percent symbol. Example: Change to a percent 3 5 0.6 x 100 = 60% When changing a whole number to a percent, multiply by 100 and add the percent symbol. Example: Change 10 to percent 10 x 100 = 1000% Percents are usually 100% or less. Percents are most often used to describe a fraction, but can be used to show values greater than 1(100%). Examples are 110%, 200%, etc. Changing a Percent to a Decimal Any number written as a percent may be written as a decimal. To change a percent to a decimal, drop the percent symbol and divide by 100. Example: Express 33.5% in decimal form. = 0.335 33.5 100 Express 3.35% in decimal form. = 0.0335 3.35 100 Rev. 0 Page 57 MA-01

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