What is the ratio of the number of females in the HR and Accounts department together to the number of males in the same department together?

(Number of females in HR and Accounts) : (Number of males in HR and Accounts)
= $$ \left\{\left(\frac{65}{100}\times360\right)+\left(\frac{35}{100}\times220\right)\right\}$$       $$: \left\{\left(\frac{35}{100}\times360\right)+\left(\frac{65}{100}\times220\right)\right\}$$
= (234 + 77) : (126 + 143)
= 311 : 269