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## Staging content lifeboat

### Course: Staging content lifeboat>Unit 14

Lesson 38: Multiplying fractions word problems

# Multiplying fractions word problem: laundry

Learn how to solve word problems involving multiplication of fractions. Watch examples of real-life scenarios where fractions are multiplied, and practice applying the concept to solve similar problems. Created by Sal Khan.

## Want to join the conversation?

• upvote me plz
• I don't think this is correct because 2/3 = 4/6 and 1/2 = 3/6 so 4/6 subtract 3/6 = 1/6
• Notice that Gina used half of the detergent, not half a cup of detergent.

She started with 2∕3 cup and used 1∕2 of it,
i.e. she used (1∕2)(2∕3) = 1∕3 cup.
Thereby she'd be left with 2∕3 − 1∕3 = 1∕3 cup.
• i have no upvots
• how do you simplfy
• Simple. For example, 2/4 = 1/2 because you halve the numerator and the denominator to the simplest fraction possible.
• Why do you teach negative fractions to little kids in 5th grade
• To some students, they will be ready to take pre-algebra in sixth grade, therefore advancing to higher level math courses. Negative fraction is a foundation to future concepts that teachers would expect from high level classes.
• How do u know when a word problem is multiplying fractions or dividing fractions
• . .
U
• [: :0 :((((({
• Why multiply? Shouldn't he subtract? To get what's left he should subtract.
(1 vote)
• There are 2/3 cups of detergent and she uses 1/2 of it. She uses 1/2 of the detergent that she has, not 1/2 half of a cup. Usually, when you're trying to find a proportion of something, you're multiplying. The key word for multiplying is "of".
• Sal said, "She used a third of her detergent and has a third left". She actually used a 1/2
of her detergent.