Is a pint of liquor half of a fifth of liquor?

A "fifth" of liquor was 1/5 of a U.S. gallon (128 ounces) or 4/5 of a U.S. quart (32 ounces). So 128/5=25.6 ounces or (4/5)*32=25.6 ounces. The current bottles are 750 ml or 25.36 ounces.