Now, another way to denote the relative complement of set B in A or B subtracted from A is the notation that I'm about to write. We could have written it this way, A, and then we would have had this little figure like this that looks eerily like a division sign, but this also means the difference between set A and B where we're talking about, when we write it this way, we're talking about all of the things in set A that are not in set B or the things in set B taken out of set A or the relative complement of B in A. Now, with that out of the way, let's think about things the other way around. What would B slash, I'll just call it a slash right over here, what would B minus A be? What would B minus A be, which we could also write as B minus A. What would this be equal to? Well, just going back, we could view this as all of the things in B with all of the things in A taken out of it or all of the things, the complement of A that happens to be in B.