How to estimate a company's growth rate?

Hi KC, Peter,
 
Have done the shorting and analysis. But not too sure am doing it right.Sunway still look expensive even at PE of 8.09. By the way, some questions below. Thanks 
 
1) How do we calculate the retention rate of the dividend payout is more then the nett income like GAB and Dutch Lady. 
2) How do we then calculate the growth rate when the dividend payout is more then the nett income.
3) Is there a rule of thumb of the growth rate calculation, from the video you use 10%.  Does it relate to the quartile 1 ROE?
 
 
Regards
Daniel