Fractions & Proportions : How to Cross Multiply Proportions

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Uploaded by on Jan 29, 2009

Cross multiplying proportions is a straightforward process that is the same as cross multiplying fractions. Cross multiply by multiplying a numerator by the other side's denominator with help from a math teacher in this free video on proportions in math.

Expert: Jimmy Chang
Bio: Jimmy Chang has been a math teacher at St. Pete College for nearly a decade. He has a master's degree in math, and his specialties include calculus, algebra, liberal arts, math and trigonometry.
Filmmaker: Christopher Rokosz

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Top Comments

  • i only clicked on this because he's asian, so I assumed he was smart

  • OMG! He is asian. hahaha..

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  • thank you jimmy ur a BIG help my teacher went over this in a munite and i didnt undwrstand it -__- but thanks it realy helped

  • THANK YOU so much! i was doinga project based on this and i didnt understand it ! thank u!

  • Im 10 and i understand this lol

  • That helped thanks so much:)

  • that helped thanks :)

  • @baseballin4eva me too

    

  • you guys are racists stop this is public

  • wow always thought it was much harder, i missed school today and thought id be lost in what we in math ( which is this ) now it makes sense!

  • @batangkalye15 So then why is it so funny? and how the hell was I suppose to know?

  • @1999ShadowX haha! why u mad bro?! chill. I'm asian too. LOL!

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