Hi KiemRaekerm,
Betta breeding is different than most other fish. There is no male/female ratio per say, 1 male needs to be introduced to 1 female in a specific way using a specific setup.
The actual mating part of the breeding is fairly easy to learn, its the constant live food feeding, changing 50+ jars twice a week (all the males need to be jarred at 3 to 6 months) then trying to sell anywhere from 50 to 400 bettas to stores at only $1.00 each.
For breeding instructions visit:
http://www.bettatalk.com/breeding_bettas.htm
Prepare to spend 15 hours per week on feeding and water changes. Oh, and about $300 in tank setup, live food and other accessories your going to need to breed them.
Here is my first betta breeding diary:
http://www.myfishtank.net/forum/showthread.php?s=&threadid=11888
Good Luck!