Proportions

Hello and welcome to this video about proportions! In this video, we will explore what proportions are, what it means for quantities to be proportional, and mathematical and authentic applications of proportions.

[oscarmike]

Why are you diving by 3 and multiplying by 4? Where did those numbers come from. @9:26

[Donutoftheheart]

Wow— this absolutely confused the heck out of me

[kristendavidson]

Correction @ 8:35 if you multiply both sides by 15 like you said, .2634 x 15 is not 3.941. It is 3.951.

[christiansoto]

That last problem got me tweakin'. It's not even hard, just put it as a word problem so we can more easily follow along. The English section did it pretty well.

[reneehubbard]

Why does this need to be so difficult. This excess of steps is why so many people have problems with math. In the problem where 25% saved and price is 140.67- All that needs to be done is take the 75% (which makes the whole of the 25 % saved) and divide by the sale price. This then gives you the original price. 140.67 / 75% = 187.56

[kathbot]

I'm fairly certain the explanation for inverse equations and how they are graphed is wrong in this video. I had to go look to Khan Academy for help. Pretty sad since I paid money for the book that goes with this video just to be taught wrong and have to go somewhere else.

[digsfortubers]

You are so terrible to explain math to beginners. You need to explain why you’re doing some operations. Why are you dividing by 3 and 4??

[mortiflerg]

This was not done well at all. I went in feeling like I understood the operations and just wanted a quick check, left feeling like I had no idea what was going on. Not only is 26.34 x .15 =3.951 and NOT 3.941, you did not give clear reasoning as to why you did certain operations. This is a book I paid for, and now I'm questioning if anything I'm learning from it is even done correctly. This video has 2.3k views, that's 2.3k people who were instructed incorrectly.