бутылка виски(емк.одна пятая галлона; a unit of volume for distilled beverages in the United States, equal to one fifth of a US gallon – approx.750 ml. Val_Ships)
на одну пятую ... меньше, чем(Mitsubishi says the MRJ burns a fifth less fuel than aircraft of similar size, thanks to new-generation engines from Pratt & Whitney, a subsidiary of United Technologies Corp. Oleksandr Spirin)