What percentage of beer is made up of water?

Water is the primary ingredient in beer, typically accounting for about 90% of the final product. This high percentage underscores the significance of water quality in brewing since it affects the overall flavor and characteristics of the beer. The exact percentage can vary slightly depending on the style of beer and brewing process, but commonly, water consistently forms the largest component by volume. Other ingredients like malt, hops, and yeast make up the remaining percentage, contributing to the beer's flavor, aroma, and other properties. The choice of 90% accurately reflects this standard composition in most beers produced.