Ch 18: Ratios, Rates & Proportional Relationships

About This Chapter

This chapter has everything you'll need to know regarding ratios, rate and proportional relationships. The comprehensive video lessons and practice quizzes can help you refresh your knowledge on how to solve problems related to these math concepts.

Ratios, Rates & Proportional Relationships - Chapter Summary

Use the engaging lessons in this chapter to help you understand ratios, rates and proportional relationships. You can see examples of how to perform calculations with ratios and proportions as well as how to figure out the amount of tax on an item. Topics covered in this chapter include:

  • Ways to compare numbers and items using rates and ratios
  • How to apply the unit rate of change
  • Applications of proportions
  • Calculating problems with ratios and proportions
  • Determining tax and discounts
  • Ways to calculate simple interest
  • Proportional relationships that occur with triangles

The brief and entertaining video lessons are taught by experienced and knowledgeable instructors. They are accompanied by written transcripts of the videos and short quizzes to assess your knowledge. All of these resources are mobile friendly so you have the flexibility to study at home or on the go, as long as you have working Internet connection.

7 Lessons in Chapter 18: Ratios, Rates & Proportional Relationships
Test your knowledge with a 30-question chapter practice test
Ratios & Rates: Definitions & Examples

1. Ratios & Rates: Definitions & Examples

If we have two items, or two numbers, and we want to compare them, what language can we use? How do we write the comparison? Find out as we learn about ratios and rates in this lesson.

How to Find the Unit Rate

2. How to Find the Unit Rate

If we are going to use math to predict outcomes, one of the most useful measures we can establish is the unit rate of change. In this lesson, you'll learn how to find the rate of change and apply the formula to real-life examples.

Proportion: Definition, Application & Examples

3. Proportion: Definition, Application & Examples

When we want to compare one ratio, or fraction, to another equivalent ratio, it's a proportion. Learn all about proportions and practice solving proportion problems in this lesson.

Calculations with Ratios and Proportions

4. Calculations with Ratios and Proportions

Even if only 99 out of 100 people need to know how to work with ratios, the odds that they'll be useful to you are very high. In this lesson, we'll practice performing calculations with ratios and proportions.

Taxes & Discounts: Calculations & Examples

5. Taxes & Discounts: Calculations & Examples

When you go shopping, you don't want to be surprised by the amount of tax on an item. You also want to fully understand discounts to know how much you can save. In this lesson, we'll practice calculating both tax and discounts.

How to Find Simple Interest Rate: Definition, Formula & Examples

6. How to Find Simple Interest Rate: Definition, Formula & Examples

When we borrow a certain sum of money over a period of time, we agree that we will pay it back, along with a fee, known as the interest owed. Similarly, when we invest a sum of money in a savings account, the account earns us interest. This lesson will show you how to calculate a certain type of interest called simple interest.

Proportional Relationships in Triangles

7. Proportional Relationships in Triangles

The perimeters of the two triangles, corresponding medians, corresponding angle bisectors, and corresponding altitudes are all similar. In this lesson, you'll learn about some of the proportional relationships in similar triangles.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Other Chapters

Other chapters within the NYSTCE Multi-Subject - Teachers of Early Childhood (Birth-Grade 2)(211/212/245): Practice & Study Guide course

Support