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Comparing Fractions 2

August 6, 2010
by
Khan Academy
YouTube video player
Comparing Fractions 2

TL;DR

Simplify the fractions and visualize the candy bar pieces to compare 21/28 (equivalent to 3/4) and 6/9 (equivalent to 2/3), concluding that 3/4 is greater than 2/3.

Transcript

Use less than, greater than or equal to compare the two fractions 21/28 and 6/9. Now, your impulse might just be to look at these numbers and say, oh, look, these are larger numbers than those. This must be bigger. You cannot do that. And we'll talk about in future videos on why that is, or I encourage you to think about why you cannot do that, but... Read More

Key Insights

  • ❓ Simplifying fractions is essential for accurate comparison.
  • 🤢 Visualizing fractions through objects like candy bar pieces can aid understanding.
  • 🧑‍🏭 Dividing the numerator and denominator by their common factors simplifies fractions.
  • 🌥️ Comparing the size of the visualized portions can determine which fraction is larger.
  • ❓ The visual comparison aligns with the numerical comparison between 3/4 and 2/3.
  • ❓ 21/28, simplified to 3/4, is greater than 6/9, equivalent to 2/3.
  • ❓ The provided content emphasizes the importance of using the proper method to compare fractions.

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Questions & Answers

Q: How do you compare fractions using the provided content?

To compare fractions, simplify them first and visualize their representations, such as candy bar pieces, to determine which fraction is larger.

Q: What is the simplified form of 21/28?

The simplified form of 21/28 is 3/4, obtained by dividing the numerator and denominator by their common factor, 7.

Q: How can you visualize the fraction 6/9?

By considering a candy bar divided into ninths, you can visually represent 6/9 as two groups of three, demonstrating that 6/9 is equivalent to 2/3.

Q: Which fraction, 3/4 or 2/3, is larger?

Comparing visually, it is evident that 3/4 is larger than 2/3 as it represents a greater portion of the candy bar.

Summary & Key Takeaways

  • The content explains the proper way to compare fractions using simplified forms and visualization.

  • It demonstrates how to simplify 21/28 to 3/4 and 6/9 to 2/3.

  • By visualizing candy bar pieces, it shows that 3/4 is larger than 2/3.


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