After completing this chapter, students will be able to: Convert decimals to percents (including rounding percents), percents to decimals, and fractions to percents; convert percents to fractions; list and define the key elements of the portion formula; solve for one unknown of the portion formula when the other two key elements are given; calculate the rate of percent decreases and increases. | Chapter Six Percents and Their Applications Copyright © 2014 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill/Irwin LU 6-1: Conversions Convert decimals to percents (including rounding percents), percents to decimals, and fractions to percents. Convert percents to fractions. LU 6-2: Application of Percents—Portion Formula List and define the key elements of the portion formula. Solve for one unknown of the portion formula when the other two key elements are given. Calculate the rate of percent decreases and increases. Learning unit objectives Table - Bag of M&M’s Decimal Percent Color Fraction (hundredth) (hundredth) Yellow 18 .33 55 Red 10 .18 55 Blue 9 .16 55 Orange 7 .13 55 Brown 6 .11 55 Green 5 .09 55 Total 55 55 = 1 Converting Decimals to Percents .66 66 8 800 Step 1. Move decimal point 2 places to the right. You are multiplying by 100. If necessary, add zeros. Step 2. Add a percent symbol at the end | Chapter Six Percents and Their Applications Copyright © 2014 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill/Irwin LU 6-1: Conversions Convert decimals to percents (including rounding percents), percents to decimals, and fractions to percents. Convert percents to fractions. LU 6-2: Application of Percents—Portion Formula List and define the key elements of the portion formula. Solve for one unknown of the portion formula when the other two key elements are given. Calculate the rate of percent decreases and increases. Learning unit objectives Table - Bag of M&M’s Decimal Percent Color Fraction (hundredth) (hundredth) Yellow 18 .33 55 Red 10 .18 55 Blue 9 .16 55 Orange 7 .13 55 Brown 6 .11 55 Green 5 .09 55 Total 55 55 = 1 Converting Decimals to Percents .66 66 8 800 Step 1. Move decimal point 2 places to the right. You are multiplying by 100. If necessary, add zeros. Step 2. Add a percent symbol at the end of the number. Step 1 Step 2 Step 1 Step 2 % % 4 Rounding Percents .0588235 Step 1. When you convert from a fraction or decimal, be sure your answer is in percent before rounding. Step 2. Identify the specific digit. If the digit to the right of the identified digit is 5 or greater, round the identified digit. Step 3. Delete digits to the right of the identified digit. 1 % 17 .0588235 5 Rounding Percents 18 55 .3272727 55 = Step 1 Step 2 Step 3 6 Converting Percents to Decimals 66% Step 1. Drop the percent symbol. Step 2. Move decimal point 2 places to the left. You are dividing by 100. If necessary, add zeros. 66 .66 7 Converting Fractional Percents to Decimals .0775 Step 1. Convert a single fraction percent to its decimal equivalent by dividing the numerator by the denominator. Step 2. If a fractional percent is combined with a whole number (mixed fractional percent) convert the fractional percent first. Then combine the whole .
