# Chapter 5: Applying Percents

**Basic**Created by: CK-12

## Introduction

In Math 8, the learning content is divided into Concepts. Each Concept is whole and complete providing focused learning on an indicated objective. Real-world Concepts involve the student in the learning objective of each Concept. Students are given opportunities to practice skills through real-world situations, examples, guided practice and independent practice sections. There are video links provided for Concept connections with technology. In this Chapter, students will engage with content that is related to percents. Concepts will include recognizing and writing percents, percents as decimals and fractions, finding the percent of a number, proportions and percents in problem solving, using the percent equation, percent of increase, percent of decrease, percent of change, discounts, retail prices, tipping, sales tax, statistics, percent problems and scientific notation, simple interest and compound interest.

## Chapter Outline

- 5.1. Recognize and Write Percents
- 5.2. Write Percents as Decimals
- 5.3. Write Percents as Fractions
- 5.4. Find the Percent of a Number
- 5.5. Use Proportions to Find Percents
- 5.6. Use Proportions to Solve Percent Problems
- 5.7. Use the Percent Equation to Find Part a
- 5.8. Use the Percent Equation to Find the Percent
- 5.9. Use the Percent Equation to Find the Base, b
- 5.10. Find the Percent of Increase
- 5.11. Find the Percent of Decrease
- 5.12. Find the Percent of Change
- 5.13. Find Retail Prices Given Wholesale, Markups and Sales Tax
- 5.14. Find Discount Prices Given Sales
- 5.15. Solve Statistics-Based Problems Involving Percents
- 5.16. Solve Percent Problems Involving Scientific Notation
- 5.17. Solve Real-World Problems Involving Simple Interest
- 5.18. Solve Real-World Problems Involving Compound Interest

### Chapter Summary

## Summary

Having completed this chapter, students are now ready to move on to the next Chapter. Each Concept has provided students with an opportunity to engage and practice skills in many Concepts including recognizing and writing percents, percents as decimals and fractions, finding the percent of a number, proportions and percents in problem solving, using the percent equation, percent of increase, percent of decrease, percent of change, discounts, retail prices, tipping, sales tax, statistics, percent problems and scientific notation, simple interest and compound interest.