Ve’yeitze: Leah’s Children

Leah would have two more sons after Yehudah, (Yissachar and Zevulun) [Bereishis 30:17, 19].

Question:  If you total the number of children born to Leah after Yehudah they would make up what fraction of all of Yaakov’s sons?

Answer: 6/12 — > ½