Percents and Equations

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Holt CA Course Solving Percents Problems NS1.4 Calculate given percentages of quantities and solve problems involving discounts at sales, interest.

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Presentation transcript:

Percents and Equations COURSE 3 LESSON 6-4 Use an equation. 12 is 8% of what number? 12 = 0.08 • w Write a percent equation. = 12 0.08 0.08w Divide each side by 0.08. Simplify. 150 = w 6-4

Percents and Equations COURSE 3 LESSON 6-4 Use an equation. What percent of 50 is 7? 7 = P • 50 Write a percent equation. = 7 50 P • 50 Divide each side by 50. Simplify. 0.14 = P Write the decimal as a percent. 14% = P 6-4

Percents and Equations COURSE 3 LESSON 6-4 Use an equation to solve. 1. Find 81% of 110. 2. You buy a book for $17.80. Sales tax is 8%. What is the sales tax cost of the book? 3. 45 is 75% of what number? 4. Find what percent 68 is of 80. 89.1 $1.42 60 85% 6-4