New Ratio ( w,x and z) = 1: 1 :1

Gaining Ratio = New Ratio - old Ratio

Gaining Ratio = 0: 1:1

(b) Old Ratio (A,B and C) =4:3:2

C's profit share =1/9

A acquires 4/9 of c"s share and remaining share is acquired by B.

New profit share = old profit share+share acquired from C

New profit Ratio ( A and B) = 44:37

Gaining Ratio = New Ratio - old Ratio

Gaining Ratio = 8:10 or 4:5