? 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
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