1:6这怎么念,1:999怎么读

[cp]【分数、百分比、比分在口语中的读法】½读作：one half；1/3读作：one third；¼ 读作：one quarter；1/5读作：one fifth；1/ 6读作：one sixth；3/5读作：three fifths；1.5%读作：one point five percent；0.3%读作：nought / zero point three percent；2:1读作：two to one ​​​​[/cp]