Compare fractions with different denominators
A feel for which fraction is larger is what lets your child notice when an answer is unreasonable. It matters in everyday choices too, like whether 2/3 of a cup or 3/4 of a cup is more. Next year it supports adding fractions with different denominators, and it is closely tied to comparing decimals and, later, percents.
In this video, your child will learn to compare fractions with different bottom numbers.
The lesson stops at each question for your child's answer.
Three problems, each a little harder
Each problem is worked step by step. Your child will solve the last one before Bobby shows how.
Example 1
1/2 ? 3/8
Example 2
5/4 ? 7/6
Your child's turn
7/5 ? 3/2
The two key steps
- 1Make the bottoms the same
- 2Then compare the tops
Mistakes to listen for
- Thinking bigger numbers mean a bigger fraction, so 3/10 seems greater than 2/3.
- Thinking 1/8 is bigger than 1/4 because 8 is bigger than 4.
- Changing only the bottom number to get a common denominator, rewriting 2/3 as 2/6 to compare with 5/6.
The lesson shows every step, so your child sees why it works. Read our parent's guide to comparing fractions like 2/3 and 5/6 →
Is your child ready to practice what they've learned?
Bobby's Math Club offers unlimited practice for free.
Join the clubMore kid-friendly lessons
More 4th grade Numbers & Place Value, with questions your child answers along the way.
Questions parents ask
Does my child need an account to watch?
No. You can watch this on any device at any time. If your child would like to practice comparing fractions like 2/3 and 5/6, and you'd like parent-friendly reports on your child's progress and growth, you can join Bobby's Math Club for unlimited free practice.
What happens when my child answers a question?
A right answer gets a cheer, and the lesson carries on. If your child isn't sure, they can tap "I don't know yet", and Bobby gives the answer and shows another example. Nothing is scored or stored.
Is this the same lesson that's on YouTube?
Yes. Here, the lesson stops at each question and waits for your child to answer. On YouTube, each question stays on screen for a few seconds, and then the lesson plays on.
Where can I learn more?
There's a short, kid-friendly lesson like this one for every Pre-K to 5th grade math skill, all in our video library. Our parent's guide to comparing fractions like 2/3 and 5/6 has more on where kids get stuck and how you can help at home. In the club, your child practices at just the right level, about five minutes a day, and you get parent-friendly reports as they grow. Learn more about how it works →
Practice comparing fractions like 2/3 and 5/6
Questions at your child's level, about five minutes a day, on comparing fractions like 2/3 and 5/6 and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
Join the club