# Ch 18: TASC Math: Calculations, Ratios, Percent & Proportions

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### About This Chapter

## Calculations, Ratios, Percent & Proportions - Chapter Summary

Use the lessons in this chapter to prepare for the TASC Math test. You can review concepts related to calculating rates, compound interest and proportions. Specifically, the lessons prepare you to solve math problems related to:

- Ratios
- Money
- Proportion
- Percents
- Interest and compound interest
- Taxes and discounts
- Combinations
- Permutations
- Time
- The distance formula

Concepts are broken down into short videos that include examples and step-by-step instructions for problem solving. These fun videos present the material in an engaging way that is easy to understand and remember. You can also use the self-assessment quizzes and chapter exam to test your comprehension and see if you are ready for test day.

## TASC Math Objectives

The 55-question TASC Math exam is broken into two sections. Section one is 50-55 minutes long and allows the use of a calculator; section two does not allow a calculator, but you have 55-60 minutes for this section. The test includes questions from five mathematical content areas: numbers and quantity, functions, algebra, geometry and statistics. Most of the questions are multiple-choice; however, there are a few gridded-response, constructed-response and technology-enhanced questions as well. The topics in this chapter may be encountered within the questions from multiple content areas. Test questions assess your ability to select and apply the correct math procedure to solve a problem as well as test your ability to judge the reasonableness of a solution.

### 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.

### 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.

### 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.

### 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.

### 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.

### 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.

### 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.

### 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.

### 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.

### 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.

### 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.

### 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.

### 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.

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### Other Chapters

Other chapters within the TASC Mathematics: Prep and Practice course

- TASC Math: Real Numbers
- TASC Math: Complex and Imaginary Numbers Review
- TASC Math: Algebraic Expressions and Equations
- TASC Math: Exponents and Exponential Expressions
- TASC Math: Radical Expressions
- TASC Math: Functions
- TASC Math: Graphing and Functions
- TASC Math: Inequalities
- TASC Math: Algebraic Distribution
- TASC Math: Linear Equations
- TASC Math: Factoring
- TASC Math: Quadratic Equations
- TASC Math: Graphing and Factoring Quadratic Equations
- TASC Math: Properties of Polynomial Functions
- TASC Math: Rational Expressions
- TASC Math: Measurement
- TASC Math: Geometry
- TASC Math: Data, Statistics, and Probability
- TASC Math: Trigonometry