If there are two full sisters and a paternal half-sister, how is their inheritance?

Question:
He says: Honorable Shaykh, may Allah grant you success, if there are two full sisters and a paternal half-sister, how is their inheritance?

Answer:
The two full sisters take two-thirds. As for the remainder, if there is a brother with the paternal half-sister who is a residuary heir, they take the remainder. However, if there is no brother with her, she is excluded, and the inheritance goes to the nearest residuary heir. But if there is a full sister and a paternal half-sister, the full sister takes one-half and the paternal half-sister takes one-sixth to complete the two-thirds.