割合

1. Origins, structure, and basic meaning

• Structure: Spelling: 割合. Reading: わりあい. Core meaning: proportion; relatively.
• Basic usage: Representative examples: 参加者に占める学生の割合を円グラフにした / この道は割合静かで歩きやすい.

2. Common pitfalls and similar expressions

• Noun and adverb
  • In 学生の割合, it is a noun meaning proportion; in 割合静かだ, it is an adverb meaning relatively. The surrounding construction distinguishes both part of speech and sense.