It's usually recommended to have about 10 hens per rooster.
That's not a hard-and-fast rule, and some breeders keep pairs and trios, but I can tell you that with two males and 21 ladies I had a lot of bare backs.
@Mrs. K has very good advice in re: roosters.
One piece of that advice is that it's often best to have hens only for your first year or so while you learn about chickens.
How many birds do you have total?
How many are male and how many female? I'm sorry, I'm a little confused from the...