# Mastering the Art of Dividing Improper Fractions Unlock the secrets of dividing improper fractions with our expert guidance. Learn foolproof techniques, avoid common pitfalls, and boost your math confidence through clear explanations and practice exercises.

Now Playing:Divide fractions and mixed numbers – Example 0a
Intros
1. Simplify fractions: Method A - By using greatest common factors
2. Simplify fractions: Method B - By using common factors
Examples
1. Dividing Fractions and Mixed Numbers Using Diagrams
Find each of the following quotients by using diagrams.
1. $\frac{5}{6} \div \frac{3}{4}$

2. $2\frac{1}{3} \div \frac{1}{8}$

3. $\frac{7}{5} \div \frac{1}{2}$

Practice
What are fractions?
Notes
In this section, we will use diagrams to divide fractions and mixed numbers (a.k.a. compound fractions) for the purpose of helping you getting a better understanding about the concepts of fraction division. We will also teach you how to divide fractions by using multiplications.

In this lesson, we will learn:

• Dividing Fractions and Mixed Numbers Using Diagrams
• Dividing Fractions and Mixed Numbers Algebraically
• Word Problems: Dividing Fractions and Mixed Numbers
• Dividing Fractions and Mixed Numbers Involving Multiple-digit and Negative Numbers
Concept

## Introduction to Dividing Fractions and Mixed Numbers

Dividing fractions and mixed numbers is a crucial mathematical skill that builds upon students' understanding of basic fraction operations. Our introduction video serves as an essential tool in helping students visualize this complex concept, making it more accessible and easier to grasp. The video breaks down the process step-by-step, illustrating how to convert mixed numbers to improper fractions and apply the reciprocal method for division. Many students often struggle with the counterintuitive nature of fraction division, where multiplying by the reciprocal is key. Common challenges include forgetting to flip the second fraction or mishandling whole numbers in mixed fractions. By providing clear visual representations and real-world examples, the video aims to demystify these concepts and build confidence in students' ability to tackle more advanced fraction problems. Understanding division of fractions and mixed numbers is fundamental for success in higher-level mathematics and practical applications in everyday life.

Example

Dividing Fractions and Mixed Numbers Using Diagrams
Find each of the following quotients by using diagrams. $\frac{5}{6} \div \frac{3}{4}$

#### Step 1: Understanding the Problem

To solve the problem $\frac{5}{6} \div \frac{3}{4}$ using diagrams, we need to understand what the division of fractions means. Essentially, we are trying to determine how many times $\frac{3}{4}$ fits into $\frac{5}{6}$. This can be visualized using diagrams to make the concept clearer.

#### Step 2: Drawing the Diagrams

First, we need to represent both fractions using diagrams. We will use rectangles to represent these fractions.

• Draw a rectangle and divide it into 6 equal parts to represent $\frac{5}{6}$. Shade 5 out of the 6 parts to show $\frac{5}{6}$.
• Draw another rectangle of the same size and divide it into 4 equal parts to represent $\frac{3}{4}$. Shade 3 out of the 4 parts to show $\frac{3}{4}$.

#### Step 3: Finding a Common Denominator

To compare the two fractions accurately, we need to find a common denominator. The least common multiple of 6 and 4 is 12. Therefore, we will convert both fractions to have a denominator of 12.

• Convert $\frac{5}{6}$ to $\frac{10}{12}$ by multiplying both the numerator and the denominator by 2.
• Convert $\frac{3}{4}$ to $\frac{9}{12}$ by multiplying both the numerator and the denominator by 3.

#### Step 4: Redrawing the Diagrams

Now, redraw the rectangles to reflect the new fractions with a common denominator of 12.

• For $\frac{10}{12}$, divide the rectangle into 12 equal parts and shade 10 of them.
• For $\frac{9}{12}$, divide the rectangle into 12 equal parts and shade 9 of them.

#### Step 5: Comparing the Fractions

Now, we need to determine how many times $\frac{9}{12}$ fits into $\frac{10}{12}$. This can be visualized by comparing the shaded parts of the two rectangles.

• Count how many full $\frac{9}{12}$ sections fit into the $\frac{10}{12}$ section. You will find that one full $\frac{9}{12}$ section fits, with some leftover.
• Determine the leftover part. The leftover part is $\frac{1}{12}$ of the original rectangle.

#### Step 6: Calculating the Final Answer

To find the final answer, we need to express the leftover part as a fraction of $\frac{9}{12}$.

• The leftover part is $\frac{1}{12}$, and since $\frac{9}{12}$ is the fraction we are dividing by, we need to determine what fraction of $\frac{9}{12}$ is $\frac{1}{12}$.
• $\frac{1}{12}$ is $\frac{1}{9}$ of $\frac{9}{12}$.

Therefore, the final answer is 1 full $\frac{9}{12}$ section plus $\frac{1}{9}$ of another $\frac{9}{12}$ section, which can be written as $1 \frac{1}{9}$.

FAQs

Here are some frequently asked questions about dividing fractions and mixed numbers:

#### 1. How do you divide by an improper fraction?

To divide by an improper fraction, follow these steps: 1. Convert the improper fraction to a mixed number if desired. 2. Flip the improper fraction (find its reciprocal). 3. Multiply the first fraction by the reciprocal of the second fraction. 4. Simplify the result if possible.

#### 2. What are the 3 rules for dividing fractions?

The three main rules for dividing fractions are: 1. Keep the first fraction as it is. 2. Change the division sign to multiplication. 3. Flip the second fraction (find its reciprocal).

#### 3. How do you divide improper fractions in algebra?

To divide improper fractions in algebra: 1. Write the division as a fraction. 2. Multiply the first fraction by the reciprocal of the second fraction. 3. Simplify the resulting fraction if possible. For example: (5/3) ÷ (7/4) = (5/3) × (4/7) = 20/21

#### 4. What are the steps in dividing proper fractions?

To divide proper fractions: 1. Keep the first fraction unchanged. 2. Change the division sign to multiplication. 3. Flip the second fraction (find its reciprocal). 4. Multiply the numerators and denominators. 5. Simplify the result if possible.

#### 5. How do you divide mixed numbers?

To divide mixed numbers: 1. Convert both mixed numbers to improper fractions. 2. Follow the steps for dividing fractions (keep, change, flip). 3. Multiply the numerators and denominators. 4. Simplify the result and convert back to a mixed number if needed.

Prerequisites

Understanding the fundamentals of fractions and mixed numbers is crucial before diving into the complex world of dividing them. A solid grasp of basic fraction operations forms the foundation for more advanced calculations. These operations include addition, subtraction, multiplication, and division, which are essential skills for manipulating fractions effectively.

Before tackling division, it's important to master multiplying improper fractions and mixed numbers. This skill is closely related to division, as division of fractions often involves multiplication by the reciprocal. Additionally, understanding integer division provides a crucial stepping stone, as it introduces the concept of division and its properties.

While it may seem unrelated at first, proficiency in adding and subtracting mixed numbers is also important. These skills help in simplifying expressions and finding common denominators, which can be useful when dividing fractions and mixed numbers. Moreover, the ability to convert between improper fractions and mixed numbers is often necessary during division problems.

As you progress, you'll find that solving linear equations using multiplication and division becomes relevant. This algebraic skill helps in understanding how division of fractions can be applied in more complex mathematical scenarios. It also reinforces the inverse relationship between multiplication and division.

Although it might not seem directly related, understanding proportional reasoning through graphs of linear relationships can provide valuable insights. This concept helps in visualizing how fractions relate to each other and how division affects these relationships.

Ultimately, the goal is to become proficient in solving problems with rational numbers in fraction form. This skill encompasses all the previous topics and directly applies to dividing fractions and mixed numbers. It involves interpreting word problems, setting up appropriate equations, and using division of fractions to find solutions.

By mastering these prerequisite topics, you'll build a strong foundation for understanding and applying the division of fractions and mixed numbers. Each concept contributes to your overall comprehension, making the learning process smoother and more intuitive. Remember, mathematics is a cumulative subject, and each new skill builds upon previously learned concepts. Take the time to thoroughly understand these prerequisites, and you'll find that dividing fractions and mixed numbers becomes a manageable and even enjoyable challenge.