How is the commercial property divided among legal heirs?

OUR FATHER IN HIS GIFT DEED AND WILL DISTRIBUTED HIS ONE COMMERCIAL PROPERTY TO SONS, IN DIFFERENT PROPORTION. HE HAS NOT MENTIONED ANYTHING ABOUT THE COMMON PASSAGE IN HIS GIFT OR WILL. HE HAS ALSO MENTIONED IN THE WILL THAT ANYTHING NOT MENTIOND IN THE WILL TO BE DISTRIBUTED AMONG THE BROTHERS EQUALLY. MY QUESTION IS IN CASE OF SALE OF WHOLE PROPERTY THE COMMON PASSAGE SHOULD BE DIVIDED EQUALLY BETWEEN THE BROTHERS OR IN PROPORTION OF BUILDED SHARES GIVEN TO THEM IN THE GIFT OR IN THE WILL. PLEASE ANSWER