What is the ratio of the total sales of Branch B 2 for both the years to the total sales of Branch B 4 for both the years?

∴ Required ratio = the ratio of the total sales of Branch B₂ in 2000 and 2001 years : the ratio of the total sales of Branch B₄ in 2000 and 2001 years
the ratio of the total sales of Branch B₂ in 2000 and 2001 years = 75 + 65 = 140
the ratio of the total sales of Branch B₄ in 2000 and 2001 years = 85 + 95 = 180
Required ratio = 140:180 = 7:9