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Percents

Chapter 6. Percents. Applications of Percent. 6.4. Example. 18% of Frank’s wages are withheld for income tax. Find the amount withheld from Frank’s wages of $3680 per month. 18% of 3680 is what number?. percent. base. amount.

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Percents

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  1. Chapter 6 Percents

  2. Applications of Percent 6.4

  3. Example 18% of Frank’s wages are withheld for income tax. Find the amount withheld from Frank’s wages of $3680 per month. 18% of 3680 is what number? percent base amount Thus, $662.40 were held from Frank’s wages.

  4. Example Mr. Buccaran, the principal of Slidell High School, counted 31 freshmen absent during a particular day. If this is 4% of the total number of freshmen, how many freshmen are there at Slidell High School? Now we solve for n. Method 1 31 is 4% of what number? 31 = 0.04 ·n 31 = 4% ·n There are 775 freshmen in the school. continued

  5. continued Mr. Buccaran, the principal of Slidell High School, counted 31 freshmen absent during a particular day. If this is 4% of the total number of freshmen, how many freshmen are there at Slidell High School? Method 2 31 is 4% of what number? base amount percent There are 775 freshmen in the school.

  6. Finding Percent of Increase Percent of Increase Then write the quotient as a percent.

  7. Example The average soft-drink size has increased from 13.1 oz to 19.9 oz over the past two decades. Find the percent increase. (Source: University of North Carolina at Chapel Hill, Journal for American Medicine) First we find the amount of increase; 19.9 – 13.1 = 6.8. The amount of increase is 6.8. To find the percent of increase,

  8. Finding Percent of Decrease Percent of Decrease Then write the quotient as a percent.

  9. Example John Smith decided to decrease the number of calories in his diet from 3250 to 2100. Find the percent decrease. First we find the amount of decrease; 3250 – 2100 = 1150. The amount of decrease is 1150. To find the percent of decrease,

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