Yes, by using a hydrometer.
3.8 % in bottles or can and has been for some time now, unsure about percentage on draught.
Drink ten bottles of it... And observe what happens to you... The answer is there...
The volume in litres, multiplied by the percentage that is alcohol.
Approximately 5% alcohol by volume (ABV).
Delirium Tremens has an alcohol percentage of 8.5%.
Busch beer has an alcohol content of 4.6 percent.
This depends on the state the beer is being sold in. States govern beer labels and what must be printed on them, as label declarations of alcohol content in beer is not a Federal law.
Throwing up will not reduce your current blood alcohol percentage, but if there is unabsorbed alcohol in your stomach, throwing up can prevent your blood alcohol percentage from increasing through additional absorption. Metabolism and time is the only way to reduce your blood alcohol percentage.
Blood alcohol concentration (sometimes called blood alcohol content) or BAL is a measure of the proportion of alcohol in a person's blood.
Put simply for lets say the percentage of alcohol is 40%, for every 100mls the alcohol content would be 40 mls the rest is what ever the "drink" is made from
in UK it is 4.5%
The total amount of alcohol content will not diminish. However as the volume of liquid is increased then the alcohol percentage by volume will decrease. Some may also evaporate with the hot water but it would be a very small amount.