Hmm not sure but why don’t you use 199 proof Everclear - math would be easier. 
:/

Sent from my iPhone

> On Mar 14, 2019, at 8:25 AM, PT Ferrance <[email protected]> wrote:
> 
> This is almost embarrassing to admit except I am so long away from algebra... 
>  I am tincturing using a new device which requires a minimum of 2 cups of 
> liquid but 3 is better so that is what I am using.
> 
> The problem is:  if I combine 8oz of 40% ethanol (80 proof) with 8oz of 76% 
> ethanol (153 proof) and then add 8oz of distilled water, what percentage of 
> ethanol will the final 3 cups be?  
> 
> I'm blushing to even have to write this but I have to get this project done 
> and the final amount of ethanol needs to be known.  I would really appreciate 
> understanding how to get the final answer so I can just make adjustments 
> going forward.
> 
> Thanks for any help you can give.
> PT
>