Find equivalent fractions by multiplying or dividing
Equal fractions open the door to most of the fraction work ahead for your child, starting this year with comparing fractions and renaming tenths as hundredths. In 5th grade, adding 1/2 + 1/3 means rewriting both as sixths, and simplifying an answer like 6/8 to 3/4 relies on the same idea. Later, ratios and percents work the same way: 3/4 is 75/100, or 75%.
In this video, your child will learn to find equal fractions by multiplying or dividing.
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
What is the missing number? 1/3 = ?/6
Example 2
What is the missing number? 6/10 = 3/?
Your child's turn
What is the missing number? 9/12 = 3/?
The three key steps
- 1Split each part the same way
- 2Multiply both by that number
- 3Joining parts? Divide both
Mistakes to listen for
- Multiplying only the bottom number and saying 3/4 equals 3/8, which is a smaller amount.
- Adding the same number to the top and bottom, so 2/3 seems equal to 4/5.
- Using the multiplying rule without being able to draw or explain why 2/5 and 4/10 are the same amount.
The lesson shows every step, so your child sees why it works. Read our parent's guide to why fractions like 3/4 and 6/8 are equal →
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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 why fractions like 3/4 and 6/8 are equal, 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 why fractions like 3/4 and 6/8 are equal 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 why fractions like 3/4 and 6/8 are equal
Questions at your child's level, about five minutes a day, on why fractions like 3/4 and 6/8 are equal and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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