# Ch 22: THEA Test: Decimals & Percentages

### About This Chapter

## THEA Test: Decimals & Percentages - Chapter Summary

This chapter is designed to prepare you for questions pertaining to decimals and percentages on the THEA test in Texas. Review the lessons to prepare yourself to address the following on the exam:

- Defining the decimal place value, and comparing and ordering decimals
- Explaining how zeros are used as decimals and how to round decimals
- Understanding how to add, subtract, multiply and divide decimals
- Estimating with decimals to solve math problems
- Converting from percent notation to fraction and decimal notation
- Changing between decimals and percents, as well as decimals and fractions
- Describing how to convert fractional notation to percent notation and solve word problems that use percents

The instructors in the video lessons ensure your learning process is comprehensive and fun by helping you perform the mathematical operations needed to fully understand decimals and percentages. This unique approach to online instruction helps you confidently answer questions on the exam.

### THEA Test: Decimals & Percentages Objectives

The THEA test is designed to gauge the reading, mathematics and writing comprehension of students preparing to enter their freshman years at Texas public colleges and universities. The test is divided into three sections. Lessons topics in this chapter are found in the mathematics section, which consists of 50 multiple-choice questions.

You can prepare for questions related to decimals and percentages on the test by reviewing this chapter's lessons. You can watch the lessons in their video format or access full lesson transcripts that feature helpful vocabulary words. To gauge how well you understand lesson concepts, take self-assessment quizzes and a chapter exam.

### 1. What is a Decimal Place Value?

In this video lesson, you will see how a decimal, a simple dot, can change the place value of all the digits in a number. You will also learn how to read decimals using place values.

### 2. Comparing and Ordering Decimals

In this video lesson, you'll find out how you can look at any two decimals and immediately tell which is greater than the other. You'll also learn how to quickly sort decimals from least to greatest or vice versa.

### 3. How Zeros Are Used in Decimals

Zero is a very small but also very important digit. Watch this lesson and learn how it is used in decimal numbers to keep place and for accuracy purposes.

### 4. How to Round Decimals

After watching this video lesson, you will be able to look at any decimal number and round it any which way you want. Learn the tipping point that determines whether to go up to the next number or not.

### 5. Adding and Subtracting Decimals: Examples & Word Problems

In math, we sometimes have to deal with decimal numbers instead of our nice whole numbers. Watch this video lesson to learn the one thing that you have to take into consideration when adding and subtracting decimals.

### 6. Multiplying and Dividing Decimals: Examples & Word Problems

Watch this video lesson to learn what you need to do to get a correct answer when multiplying and dividing decimals. Learn the easy tricks to figuring out where the decimal point goes.

### 7. How to Estimate with Decimals to Solve Math Problems

Watch this video lesson to learn how you can estimate problems with decimals in them so you can get a quick answer when you need it - for example, when you are at the gas station and you need to know how much gas you can afford.

### 8. What is a Percent? - Definition & Examples

Thinking in terms of pizza is an excellent way to think about percentages. Learn how it can help you understand percentages in this video lesson. You will also learn about the uses of percentages in the real world.

### 9. Converting from Percent Notation to Decimal Notation

Knowing how to convert a percent to a decimal can be a useful skill in many different situations. This lesson will show you how to perform that conversion and places where this skill will be helpful.

### 10. Converting Percent Notation to Fraction Notation

The process of converting percents to fractions is quite easy if you know where to start. This lesson will show you how to perform the conversion and give some real-world examples.

### 11. Changing Between Decimals and Percents

Watch as we go on a rollercoaster ride in changing from a decimal to percent and then back again. Learn to master this technique so you can get as fast as a rollercoaster going downhill on tests and quizzes when you have to convert between the two.

### 12. Changing Between Decimals and Fractions

In this video lesson, you will learn about the usefulness of knowing how to change quickly between decimals and fractions. You will also learn how changing from a decimal to a fraction is different than changing from a fraction to a decimal.

### 13. Converting Fractions to Percents

There are times when it is important to know how to convert a fraction to a percent. Fortunately, the steps to perform this conversion are not difficult. This lesson will show you those steps and give some examples.

### 14. 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.

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### Other Chapters

Other chapters within the THEA Test: Practice & Study Guide course

- THEA Test: Understanding Words & Phrases
- THEA Test: Analyzing Literature
- THEA Test: Reading Comprehension & Interpretation
- THEA Test: Point of View & Meaning in Literature
- THEA Test: Drawing Conclusions from Ideas in Text
- THEA Test: Using Critical Thinking to Evaluate Writing
- THEA Test: Understanding Reading Assignments
- THEA Test: Writing Style
- THEA Test: Writing Organization
- THEA Test: Writing Grammar & Mechanics
- THEA Test: Using Verbs
- THEA Test: Using Modifiers
- THEA Test: Using Nouns & Pronouns
- THEA Test: Proofreading & Editing Your Writing
- THEA Test: Fundamental Arithmetic
- THEA Test: Simplifying Whole Number Expressions
- THEA Test: Negative Numbers
- THEA Test: Absolute Value
- THEA Test: Properties of Basic Math
- THEA Test: Solving Word Problems
- THEA Test: Fractions
- THEA Test: Ratios & Proportions
- THEA Test: Units of Measurement
- THEA Test: Scientific Notation
- THEA Test: Radicals & Square Roots
- THEA Test: Radical Expressions
- THEA Test: Exponents
- THEA Test: Calculating & Plotting Data
- THEA Test: Solving Rational Equations
- THEA Test: Graphing Linear Equations
- THEA Test: Principles of Algebra
- THEA Test: Algebraic Expressions & Equations
- THEA Test: Word Problems in Algebra
- THEA Test: Properties of Functions
- THEA Test: Quadratic Equations
- THEA Test: Two-Variable Equations & Systems of Equations
- THEA Test: Properties of Polynomial Functions
- THEA Test: Properties & Theorems of Geometry
- THEA Test: Principles of Geometry
- THEA Test: Area, Perimeter & Volume in Geometry
- THEA Test: Problem Solving in Math
- THEA Test Flashcards