Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
 Kuna wanafunzi 400. Wanafunzi 120 wanachukua ngoma kama somo la hiari. Wanafunzi 200 wanachukua sanaa kama somo la hiari. Wengine wanachukua muziki. Asilimia ngapi ya wanafunzi wanachukua muziki?


### Response:
 Kuna wanafunzi 400-120-200=<<400-120-200=80>>80 katika muziki.
Hii ni 80/400=<<80/400=0.2>>0.2.
Hivyo, wanafunzi wa muziki wanafanya (0.2)*100=<<(0.2)*100=20>>20% ya wanafunzi.