3 sentences

1. 两万的三分之一是多少？

   liǎng wàn de sān​fēn​zhī​yī shì duō​shao?

   What is one-third of 20,000?

   Source: OpenSubtitles

2. 这个分数可以约简为三分之一。

   zhè gè fēn​shù kě​yǐ yuē jiǎn wéi sān​fēn​zhī​yī.

   This fraction can be reduced to one-third.

   Source: Dong Chinese Dictionary

3. 大约三分之一的学生通过了考试。

   dà​yuē sān​fēn​zhī​yī de xué​sheng tōng​guò le kǎo​shì.

   About one-third of the students passed the exam.

   Source: Dong Chinese Dictionary