From 2007 to 2008, the computer sales increased by 40% and the printer sales decreased by 40%. The ratio of printer sales to computer sales in 2008 was how many times the ratio of printer sales to computer sales in 2007?
A. 5/3
B. 3/5
C. 7/3
D. 3/7
E. 1
Let c be the computer sales in 2007 and p the printer sales in 2007.
Then, the computer sales in 2008 are 1.4c and the printer sales in 2000 are 0.6p.
Ratio of printer sales to computer sales in 2008 = 0.6p/1.4c.
Ratio of printer sales to computer sales in 2007= p/c.
Dividing the above two ratios, we get 0.6/1.4 = 6/14 = 3/7.