If \(x=\frac{1}{20.~21}+\frac{1}{21.22}+\ldots +\frac{1}{29.30}~and~y=\frac{1}{30.31}+\frac{1}{31.32}+\ldots +\frac{1}{39.40},\) then what is the value of x/y?

• A. 1/2
• B. 2
• C. 4
• D. 1/4