<P> The proof system in the United States was established around 1848 and was based on percent alcohol rather than specific gravity . 50 % alcohol was defined as 100 proof . </P>
<P> The proof system in the United States was established around 1848 and was based on percent alcohol rather than specific gravity . 50 % alcohol was defined as 100 proof . </P>
what is the percent alcohol of 100 proof whiskey
what is the percent alcohol of 100 proof whiskey
50 %
50 %