Data Sufficiency

From 2005 to 2006, by what percent did the sales of Company A increase?

(1) In 2005, the sales for Company A were 1/4 of the sales of Company B.

(2) In 2006, the sales for Company A were 3/4 of the sales of Company B.

I thought I had the right answer to this problem, but I was wrong. Can someone please explain

I shall post the answer after a few replies

Thanks

hi
seems like E
(1) if in 2005 the sales in B were X, sales in A were (1/4)*x insuff
(2) if in 2006 the sales in B were x1. sales in A were (3/4)*x1
eveb together it is impossible to know
(3/4)*x1-(1/4)*x-? at least we need to know the ratio between x and x1

the answer is E

For some reason I just assumed the sales to be identical in both periods.

anyway, thanks for your response clock60