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### Course: Arithmetic (all content)>Unit 5

Lesson 23: Multiplying fractions word problems

# Multiplying fractions word problem: pumpkin pie

Oops! Someone tried to solve this problem and made a mistake. See if you can spot the error. Created by Sal Khan.

## Want to join the conversation?

• isn't it obvious that it is explanation a
• It might be obvious, but it's always a wise idea to go over the other answers to confirm that they're not the one you're looking for. It's really frustrating to know the right answer, but get the question marked wrong because of a silly mistake (I do that way too often). Sal is showing us, not only how to find the right answer, but also how to avoid those silly mistakes.
• why is he showing us the longer way to solve this
• He wants us to go over it the longer way so that we won't make a silly mistake.
(1 vote)
• I don't get it about the 14/35
• The answer 14/35 is wrong because instead of multiplying 2/5 times 7 the Ken kid in the video multiplies 2/5 times 7/7 which is the same as multiplying by 1. When you multiply 2/5 times 7 You get 14/5 not 14/35.
(1 vote)
• how does multiplying the denominator not change the answer? i don't get it
• Quick question that I'm pretty sure is unrelated to the video. Can you simplify fractions that you have to multiply with? Say, you're doing a problem with 21/24. Could you simplify that, and still get the right answer? I'm pretty sure you can, but I thought it would be a good question to ask.
(1 vote)
• Yes you can, it will save you a lot of time too. Then you won't have to Simplify at the End. Good Question!
(1 vote)
• Omg i saw it, he said to multiply but its wrong!!
(1 vote)
• Are multiplying fractions the same as decimals?
(1 vote)
• Yes and no. Decimals can be converted to fractions, and vise versa.
(1 vote)
• Why do you not earn points in some badges you earn easy or hard?
(1 vote)
• pumpkins! i love pumpkins? jk i love them
(1 vote)
• Paul bought 25 kg of rice and he used 1 ¾ kg on the first day, 4 ½ kg on the second day.
Find the remaining quantity of rice left
(1 vote)