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

### Instruction:
 Baada ya kutembelea aquarium mpya iliyofunguliwa, asilimia 40 ya wageni wa aquarium walipata ugonjwa wa kushangaza. Ikiwa kulikuwa na wageni 500, wangapi kati yao hawakupata ugonjwa?


### Response:
 Kwa kuwa asilimia 40 ya wageni walipata ugonjwa, hii inamaanisha asilimia 100 - 40 = 60% hawakupata ugonjwa.
Hivyo, idadi ya wageni ambao hawakupata ugonjwa ni 60/100 * 500 wageni = <<60/100*500=300>>300 wageni.