A and B are partners sharing profits in the ratio of 5 : 3. A surrenders 1/4th of his share and B surrenders 1/5 of his share in favour of C, a new partner. What is the sacrificing ratio?

25:12

Sacrifice of partner = Old share - New share
Old ratio is 5:3
Sacrifice of A= 1/4*5/8=5/32
Sacrifice of B= 1/5*3/8=3/40
Sacrificing Ratio = 5/32:3/40
                          =25/160:12:160
                          =25:12