How does Alcohol percentage work?

Question

Trying to figure this out, I drank an 8% Stout. Is this the same as drinking two 4% beers or am I stupid?

Quick edit: I drink three 8% stouts, I assume this is the equivalent of six 4% beers of the same volume?

In: 3

Answer 1

Assuming the volume is the same yes. For every 100 gallons 4 percent would have 4 gallons of alcohol and 8 percent would have 8 gallons of alcohol