Description: Sal shows that two fractions are equivalent only if they refer to the same whole. Now given that we know that, which of these, I guess you could say, picture equations actually show us that that is true? If we go on the right side, we have six equal sections, so it's divided into 1/6, and we have two of them shaded in. So this one looks like a good picture explanation or a visual explanation for why 1/3 is equal to 2/6.*Teacher Advisor is 100% free.