How much spirits (40%) corresponds to 100 cl of light 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 X the volume in cl X 0.025).” (MHF)
3.5 * 100 * 0.025 = 8.75 cl (round up to 9 cl)
(0.025 is the same as dividing by 40)
Do you really need to be able to do this?
– There are indications that questions of this type may appear on the real test.
Is the correct answer not approximately 4 cl?
– No, since it says 100 cl in the question. It is true that a normal can of light beer is 50 cl and contains approximately 4 cl of spirits. However, this involves 100 cl, i.e. 2 normal cans.