Study the given pie chart and answer the question that follows.
The pie chart shows the breakup of the total number of employees of a company working in different offices (A to E),in degrees. The total number of employees = 3600.

If the percentage of male employees in office C is 20% and that of female employees in office D is 40%, then what is the ratio of the number of female employees in office D to that of female employees in office C?