Practical is the antonym of theoretical or ideal.
Practicable means feasible that which can be done.
1. He made a few practical suggestions which were liked by all.
2. Her knowledge is practical rather than theoretical.
3. You must try to find a practical answer to the problem.
4. He is very practical person.
1. What you suggest is not practicable.
2. A practicable plan.
3. A practicable solution.