PERCENTAGES Review of Introductory MathematicsPERCENTAGESThis chapter covers the conversion between percents, decimals, and fractions.EO 1.10 CONVERT between percents, decimals, and fractions.EO 1.11 CALCULATE the percent differential.A special application of proper fractions is the use of percentage. When speaking of a 30% raisein pay, one is actually indicating a fractional part of a whole, 30/100. The word percent means"hundredth;" thus, 30% is based on the whole value being 100%. However, to perform arithmeticoperations, the 30% expression is represented as a decimal equivalent (0.30) rather than usingthe % form.CalculatorUsage,SpecialKeysPercent KeyWhen pressed, the percent key divides the displayed number by 100.ChangingDecimalstoPercentAny number written as a decimal may be written as a percent. To write a decimal as a percent,multiply the decimal by 100, and add the percent symbol.Example:Change 0.35 to percent.0.35 x 100 = 35%Example:Change 0.0125 to percent.0.0125 x 100 = 1.25%MA-01 Page 56 Rev. 0
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