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

### Instruction:
 James anahitaji samaki 40 ili kutengeneza rolli moja ya sushi. Anakwenda sokoni na kununua samaki 400, lakini baadaye anagundua kuwa 20% ya samaki wameharibika na hawawezi kutumika. James alifanya rolli ngapi za sushi na samaki waliobaki?


### Response:
 Ikiwa James alinunua samaki 400, lakini 20% walikuwa wameharibika, anaweza kutumia samaki 400 * (1-20%) = 320 kwa rolli zake za sushi.
Ikiwa unahitaji samaki 40 kutengeneza rolli moja, samaki 320 zitatosha kutengeneza rolli 320/40 = <<320/40=8>>8 za sushi.