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### Course: 4th grade (Eureka Math/EngageNY)>Unit 5

Lesson 2: Topic B: Fraction equivalence using multiplication and division

# More on equivalent fractions

Sal uses fraction models and multiplication to find equivalent fractions. Created by Sal Khan.

## Want to join the conversation?

• The fraction are numers that some time you need to multiply
• how do you know what number to multiply by the fraction
• You need to apply the divisibility rules. For example since the divisibility rule of 5 which is if a value ends in 5 or 0 it is divisible by 5. Since both 5/25 is fully divisible by 5 it becomes 1/5.
• Sal do you have to only multiply by 2
• No, you have to multiply by how much the numerator or denominator fits into the numerator or denominator on the right as per the video
• Could other numbers be divided and multiplied to the fraction? Not just two?
• How did he know to multiply by 4
• because you have to do this process to get to that certain fraction
(1 vote)
• what if its equvalent to 5/3
• 1 2/3
(1 vote)
• from to he gives it away! why does he give it away!