When talking about percents can I use ◯◯パーセント as well as ◯割◯分?


# 日本語

「◯◯パーセント」と「◯割◯分」は両方とも「◯◯％」を意味しますが、どちらを使うのが自然ですか。「◯割◯分」という表現を使いたいのですが、使う前にその言い方が九分九厘使わないものではないことを確かめた方がいいと思ったので、質問します。

# English

Both ◯◯パーセント and ◯割◯分 can mean ◯◯％. Which is the natural choice? I wanted to
use ◯割◯分 but I wanted to be sure that it is not an expression that is not used
anymore so I prefer to ask before using it.




If you only need one digit precision, for example 4割 is equally common to
40パーセント. In hasty conversations, パーセント is often shortened to パー (eg. 40パー).

If you need two digits precision, 4割5分 is no longer common today, and 45パーセント
is the normal choice.

Today, ○割○分(○厘) is used only in the following cases:

  * in a fixed expression 九割九分 (=almost certainly/always)
  * in baseball contexts to describe batting average of players (eg., ".321" is "3割2分1厘")
  * rarely in financial contexts to show interest rates




If you only need one digit precision, for example 4割 is equally common to
40パーセント. In hasty conversations, パーセント is often shortened to パー (eg. 40パー).

If you need two digits precision, 4割5分 is no longer common today, and 45パーセント
is the normal choice.

Today, ○割○分(○厘) is used only in the following cases:

  * in a fixed expression 九割九分 (=almost certainly/always)
  * in baseball contexts to describe batting average of players (eg., ".321" is "3割2分1厘")
  * rarely in financial contexts to show interest rates

