Sections:

Watch: Video Lesson

Watch: Practice Set

Watch: Test Solutions

# Multiplying Fractions

About:

Additional Resources:

In this section, we continue to learn about fractions. Our next step is to learn about multiplying fractions. How do we multiply two or more fractions together?

Multiplying Fractions:

Example 1: Find each product $$\frac{2}{3}\cdot \frac{9}{11}$$ -Each fraction is simplified

-Can we cross cancel anything? Yes a common factor of 3 between the first fraction's numerator and the second fraction's denominator $$\require{cancel}\frac{2}{\cancel{3}}\cdot \frac{\cancel{3}\cdot 3}{11}$$ $$\frac{2}{1}\cdot \frac{3}{11}$$ -Multiply the numerators together

$$2 \cdot 3=6$$ -Multiply the denominators together

$$1 \cdot 11=11$$ Result: $$\frac{6}{11}$$ $$\frac{2}{3}\cdot \frac{9}{11}=\frac{6}{11}$$

Multiplying Fractions:

- Simplify each fraction involved in the multiplication
- Setup the multiplication and look to cross cancel any common factors
- Multiply the numerators together, this gives us the numerator of the product
- Multiply the denominators together, this gives us the denominator of the product

Example 1: Find each product $$\frac{2}{3}\cdot \frac{9}{11}$$ -Each fraction is simplified

-Can we cross cancel anything? Yes a common factor of 3 between the first fraction's numerator and the second fraction's denominator $$\require{cancel}\frac{2}{\cancel{3}}\cdot \frac{\cancel{3}\cdot 3}{11}$$ $$\frac{2}{1}\cdot \frac{3}{11}$$ -Multiply the numerators together

$$2 \cdot 3=6$$ -Multiply the denominators together

$$1 \cdot 11=11$$ Result: $$\frac{6}{11}$$ $$\frac{2}{3}\cdot \frac{9}{11}=\frac{6}{11}$$

Multiplying Fractions Resources:

Videos:

Khan Academy - Video Virtual Nerd - Video Math Antics - YouTube - Video Text Lessons:

Math is Fun - Text Lesson Khan Academy - Text Lesson Purple Math - Text Lesson Worksheets:

Math-Aids - Worksheet K5 Learning - Worksheet Khan Academy - Practice + Show More +