Description: Sal adds 2 2/3 + 8 3/4. So now let's work through this together and there's a bunch of ways that you can tackle this. Plus 8 3/4 and you might be saying why whould I rewrite it this way? Well, when you rewrite it this way, it's very clear that these are the fraction parts of the mixed numbers and these are the whole number parts of the mixed numbers, and maybe we could add them separately, but before we even start adding the fraction parts of the mixed numbers, we notice that we have different denominators here.*Teacher Advisor is 100% free.