Government regulations require that all beer sold in Canada show the alcohol by volume on the label. A standard bottle of beer ( and five per cent alcohol by volume) which makes 21.6 ml of alcohol (17.05 g). The percentage of alcohol is expressed in mass per volume (g/100 ml) so it means grams of alcohol per 100 ml of solution (fluid in the bottle). It means that a 78.9% alcohol liquid would be pure, meaning only pure ethanol. In most nations, the labelled alcohol percentage is either the average or maximum percentage allowed. However, as of 1927, most Canadian provinces require the minimum alcohol percentage to be labelled rather than the average. This move was meant to eliminate inaccurate nonalcoholic labeling as well as fraudulent advertisement.