Learn how to determine the product of two fractions with unlike denominators

The video tutorial explains how to multiply fractions by multiplying the numerators and denominators directly, without needing common denominators. It warns against confusing this process with cross multiplication, which is used for solving equations involving ratios. An example is provided, showing how to multiply and then simplify the resulting fraction by identifying common factors.

When multiplying fractions, what is the correct method?

• Multiply the numerators and denominators separately

• Find a common denominator first

• Add the numerators and denominators separately

• Cross multiply the fractions

What is cross multiplication used for?

• Simplifying fractions

• Multiplying fractions

• Solving equations with ratios

• Adding fractions

Why is it important to simplify fractions?

• To make them easier to add

• To ensure they are in their simplest form

• To find a common denominator

• To prepare them for cross multiplication

What common factor was used to simplify the fraction 21/48?

• 2

• 5

• 3

• 4

What is the simplified form of the fraction 21/48?

• 7/16

• 7/48

• 21/16

• 3/16