SQL & PL/SQL

I need to remove '/' character and string comes after it. I will give an example.

CREATE TABLE TAB (COL1 VARCHAR2(50));

INSERT INTO TAB VALUES ('hIA/SS/TTTT/FFFF');

INSERT INTO TAB VALUES ('hDFF/AA/S/AAAAAAAA');

I should remove the last '/' and string comes after it so when i query , i should get result as

hiA/SS/TTTT
hDFF/AA/S

Please help me