YOU SAID:

There are at least fifteen people, at least fifteen people.

INTO JAPANESE

少なくとも 15 人、少なくとも 15 人が集まっています。

BACK INTO ENGLISH

There are at least 15 people, at least 15 people.

INTO JAPANESE

少なくとも15人、少なくとも15人がいる。

BACK INTO ENGLISH

There are at least 15 people, at least 15 people.