YOU SAID:

As you know, you recently activated a one-month promotion to receive 25% of final value.

INTO JAPANESE

ご存じのように、あなたは最近、最終価値の25％を受け取るために1ヶ月のプロモーションを開始しました。

BACK INTO ENGLISH

As you know, you recently started a one month promotion to receive 25% of final value.