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How much spirits (40%) corresponds to 50 cl of beer with 3.5 percentage alcohol by volume?
“The amount of [...] pure spirits (40 %) that a strong beer or a glass of wine corresponds to [...] can be calculated with a formula (percentage by volume * the volume in cl * 0.025).” (MHF)
3.5 * 50 * 0.025 = 4.38 cl
(0.025 is the same as dividing by 40)
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