Rational number word problem with fractions | Pre-Algebra | Khan Academy

Word problems force us to put concepts to work using real-world applications. In this example, determine the volume of frozen water and express the answer as a fraction.

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Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off!

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[Varsha-enqs]

this man has better handwriting than me on PAPER.

[pianosidechat]

Just a curious question, I've never seen you do videos like these. Are you moving towards covering more elementary education as well?

[matthewtolentino]

How did you get the 1/3 after the 9℅? Did you re-write