Thanks to you both.  Unfortunately this is the kind of thing I have been 
experiencing... widely divergent results.PT
 

    On Thursday, March 14, 2019, 10:20:42 AM EDT, Ron <ron....@gmail.com> 
wrote:  
 
  I thought it would be 2/3 of 116 = 77.3256
 
 On 3/14/2019 7:10 AM, abela...@atlasnova.com wrote:
  
 
 
38.66666 
 
  
 
Sent from Mail for Windows 10
 
  
  
From: PT Ferrance
 Sent: Thursday, March 14, 2019 6:26 AM
 To: Silverlist Post
 Subject: CS>OT
  
  
 
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