The proof is 50 per cent of the alcohol content. 80 proof is 40% alcohol.
50 percent
50 percent of 15000 is 7500.
50 percent of 250,000 is 125,000.
The percent increase from 50 to 150 is: 200%
50% alcohol Proof ÷ 2 = % alcohol
50%
40 to 50 percent 50%
50% alcohol Proof ÷ 2 = % alcohol
2/3 of 70% and 1/3 of 10%
its about 50 to 60 percent alcohol
20%
The density is a bit lowered.
One percent by weight. Alcohol has a density of less than water, so 1 g of alcohol is more than 1 mL.
They sell an 80 proof(40% alcohol) and a 100 proof(50% alcohol).
If the concentration of alcohol and water solution is 25 percent alcohol by volume, the volume of alcohol in a 200 solution is 50.
Wieland said Lysol disinfectant spray contains about 80 percent ethyl alcohol, compared with 40 percent to 50 percent in most whiskeys.