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

### Instruction:
Louie obtained 80% on a math quiz. He had 5 mistakes. How many items were there on the math quiz?

### Response:
 Louie alipata 100% - 80% = 20% ya vitu vyote vibaya, ambayo ni sawa na vitu 5.
Hivyo 1% ni sawa na vitu 5/20 = 1/4 ya kipengee.
Hivyo, idadi ya vitu vyote, ambayo ilikuwa sawa na 100, ilikuwa 100 x 1/4 = <<100*1/4=25>>25.