Laura, in hopes of confusing you even more (just kidding) Donna and I are both right but in a different sort of way It all depends on how you look at it. Donna's formula is correct, it's the much easier explanation of what I was trying to say, lol (Thanks Donna, yours is easier). But, it also depends on how you want to interpret it. What I mean is, When Donna pointed out the 8.23oz. of wax needed, I assumed she meant that much wax in addition to the .7oz. of FO. My explanation meant 8.23 oz. of wax with the FO already included. If you take the 8.23 oz. wax and add the .7oz. FO to it, you actually end up with a mixture that is 7.8% FO. If you take the 8.23 oz. of wax as already including the .7oz FO, your % of FO in the mixture ends up at 8.5% Like I said, Donna's explanation is right on (your FO on hand ÷ the % you want to achieve). What you do from there, however, may alter your end result. Although it's not a huge difference in %, it can add up to a lot of extra wax at the end. When you do it my way (I really don't want this to sound like my way is the right way, it's not, it's just a different way, lol) you can make up an amount that gives you the exact amount needed to fill your containers. You don't end up with any leftover wax. Confuzzeled yet?