 Okay guys, so just like I just said, we're going to do a quick percent recovery copulation. So this would be something that you would do if you're doing an extraction, like we did the other day, or getting trimaricin out of nutmeg, okay? So percent recovery, you don't have, nutmeg doesn't have a molecular weight, okay? So normally with, you know, percent yields when you're doing reactions, you want to convert everything to moles, okay? But since you can't convert nutmeg to moles, you're just going to use the masses of the two things, okay? So you're not going to convert trimaricin to moles like you're used to doing for percent yield, okay? Is everybody okay with that? So the amount of nutmeg that the balance told us we started out with was 0.2131, and the mass of trimaricin that we ended up with was 0.0084 grams. So the percent recovery, the mass recovered divided by the mass of the starting material, in this case nutmeg, times 100%. Okay? And with these calculations, normally in organic chemistry you don't have to worry about significant figures and all of that stuff, but you do have significant figures that were given to you from the balance, so these calculations you do have to worry about that. These and, of course, your mass by difference and stuff like that, so these numbers in the lab you have to worry about. So anyways, the mass recovered was 0.0084 grams divided by the mass of nutmeg, 0.2131 grams. Multiply that by 100%, and hopefully you notice we've got grams divided by grams there, right? So our units are going to be percentage units. Is everybody okay with that? So you're going to get a percent recovery in percentage units. Hopefully that makes sense. So let's go ahead and do this. Everybody's got their calculators, I know, since this is organic, so 0.0084 divided by 0.2131, multiplied by 100%. And we're going to do this to two significant figures, of course, so we've got a 3.9% recovery. Okay, so that's not bad. I mean, you think how much percentage of nutmeg can trimaristan actually be, you know, and how much of that did we actually recover? So probably this was a pretty good percent recovery for the amount of trimaristan that's in nutmeg relatively, if that makes sense. Okay, are there any questions on how to do this? Okay, wonderful. So what I want you to do in our next extraction is to make sure you put this calculation in your library. Okay?