전자와 후자 모두 명사절 접속사인가여?? 관계사 제외 둘다 완전문이라는 가정하에서요

그리고 statistics show that about 30% of new business fail in their first year

여기서 that 이하에서 주어가business인가요?that이랑 fail사이는 다 전치사 구 같은데...