Ch 23: Ratios, Proportions & Percent in Algebra: Help & Review

About This Chapter

The Calculations, Ratios, Percent and Proportions chapter of this High School Algebra I Help and Review course is the simplest way to master calculations, ratios, percent and proportions. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of calculations, ratios, percent and proportions.

Who's it for?

Anyone who needs help learning or mastering high school algebra I material will benefit from taking this course. There is no faster or easier way to learn high school algebra I. Among those who would benefit are:

  • Students who have fallen behind in understanding calculations and applications for ratios, percent and proportions
  • Students who struggle with learning disabilities or learning differences, including autism and ADHD
  • Students who prefer multiple ways of learning math (visual or auditory)
  • Students who have missed class time and need to catch up
  • Students who need an efficient way to learn about calculations, ratios, percent and proportions
  • Students who struggle to understand their teachers
  • Students who attend schools without extra math learning resources

How it works:

  • Find videos in our course that cover what you need to learn or review.
  • Press play and watch the video lesson.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Verify you're ready by completing the calculations, ratios, percent and proportions chapter exam.

Why it works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the calculations, ratios, percent and proportions chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any calculations, ratios, percent or proportions question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

This chapter helps students review the concepts in a calculations, ratios, percent and proportions unit of a standard high school algebra I course. Topics covered include:

  • Ratios and rates
  • Calculations with ratios and proportions
  • Solutions for word problems that use percents
  • Solutions for interest problems
  • Compound interest formulas

18 Lessons in Chapter 23: Ratios, Proportions & Percent in Algebra: Help & Review
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 Solve Problems with Money

2. How to Solve Problems with Money

Money matters, and knowing how much things cost will be useful no matter where you go. In this lesson, we'll learn the steps for solving word problems involving money.

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.

Percents: Definition, Application & Examples

5. Percents: Definition, Application & Examples

Maybe you know that 95% is an A and 75% is a C. But what do those percents really mean? In this lesson, we'll learn about percents, including how to convert them to fractions and decimals.

How to Solve Word Problems That Use Percents

6. How to Solve Word Problems That Use Percents

100 percent of percent problems can be solved if we follow the correct steps. In this lesson, we'll practice solving a variety of different percent problems.

How to Solve Interest Problems: Steps & Examples

7. How to Solve Interest Problems: Steps & Examples

If you want to know how your money can earn money, then it's essential to learn about solving interest problems. In this lesson, we'll practice calculating interest amounts and interest rates.

Compounding Interest Formulas: Calculations & Examples

8. Compounding Interest Formulas: Calculations & Examples

Compound interest is a great way to have your money work for you. In this lesson, find out the formula for calculating compound interest and practice using the formula with several examples.

Taxes & Discounts: Calculations & Examples

9. 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.

Math Combinations: Formula and Example Problems

10. Math Combinations: Formula and Example Problems

Combinations are an arrangement of objects where order does not matter. In this lesson, the coach of the Wildcats basketball team uses combinations to help his team prepare for the upcoming season.

How to Calculate a Permutation

11. How to Calculate a Permutation

A permutation is a method used to calculate the total outcomes of a situation where order is important. In this lesson, John will use permutations to help him organize the cards in his poker hand and order a pizza.

How to Solve Problems with Time

12. How to Solve Problems with Time

It's amazing how much time can be saved when people work together. In this lesson, we'll practice figuring out just how much time we're talking about as we solve problems involving time.

Distance Formulas: Calculations & Examples

13. Distance Formulas: Calculations & Examples

Let's go on a road trip! In this lesson, we'll practice calculations involving distance, rate and time. We'll also look at how we determine the relationship between distance and fuel.

Common Ratio: Definition & Concept

14. Common Ratio: Definition & Concept

The common ratio is the ratio between two numbers in a geometric sequence. Keep reading for a detailed definition, the formula for determining the common ratio and some example problems. A quiz at the end will allow you to test your knowledge.

What is a Proportion in Math? - Definition & Practice Problems

15. What is a Proportion in Math? - Definition & Practice Problems

Mathematical proportions are often used by scientists and researchers to compare information. Anytime you hear 'one out of. . .' a mathematical proportion is being used. In this lesson, you will learn the definition of a proportion and how proportions relate to equivalent fractions. When you are finished, assess your knowledge with a short practice quiz.

What is Compound Interest? - Definition, Formula & Examples

16. What is Compound Interest? - Definition, Formula & Examples

In this lesson, find out what compound interest is and what makes it different from simple interest. Then learn the formula for calculating compound interest. Finally, compare both types of interest with a graph that shows the growth in interest.

What is Elapsed Time? - Definition & Examples

17. What is Elapsed Time? - Definition & Examples

Elapsed time is simply the amount of time that passes from the beginning of an event to its end. In this lesson, you will learn how to solve for elapsed time and explore how it can be used in your everyday life.

What is Magnitude? - Definition & Concept

18. What is Magnitude? - Definition & Concept

In this lesson, you will learn a simple way of thinking about magnitude and how to find it. You will also explore the differences in magnitude for simple numbers and complex numbers.

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

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Other Chapters

Other chapters within the High School Algebra I: Help and Review course

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