What is the ratio between the Compaq sales in 1998 and those IBM in 1999?

Answer: Option B

Sale of Compaq in 1998,
= 21%
= $$\frac{7890\times 21}{100}$$
=1657

Sales of IBM in 1999,
= 17%
= $$\frac{9191\times 17}{100}$$
= 1562

Ratio = $$\frac{1657}{1562}$$ = 1.06

We have calculated total sales in 1999 is 9191 in question no. 1.