比率

1. Origins, structure, and basic meaning

• Structure: 比率 is read as ひりつ and is a noun for a ratio or proportion expressing a numerical relationship between groups or parts of a whole.
• Basic usage: A relationship between two groups appears in 男女の比率, while a share of a total budget appears in 予算に占める食費の比率.

2. Common pitfalls and similar expressions

• Compared groups and the whole
  • It is used to compare the quantities of two groups or numerically express the share of a particular part within a whole.
• Difference from 割合
  • 割合 broadly and conversationally expresses a share or degree, while 比率 readily suits formal, numerical contexts involving calculation or comparison.