3 sentences

1. 每年征税八成。

   měi nián zhēng​shuì bā​chéng.

   The annual levy is 80%.

   Source: OpenSubtitles

2. 这件衣服的含棉量在八成以上。

   zhè jiàn yī​fu de hán​mián​liàng zài bā​chéng yǐ​shàng.

   The cotton content of this garment is over 80%.

   Source: Dong Chinese Dictionary

3. 他现在还没到，八成是忘了。

   tā xiàn​zài hái méi dào, bā​chéng shì wàng le.

   He hasn't arrived yet; he's probably forgotten.

   Source: Dong Chinese Dictionary