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

### Instruction:
James needs 40 fish to make one sushi roll. He goes to the market and buys 400 fish, but later finds out that 20% of the fish have gone bad and cannot be used. How many sushi rolls did James make with the remaining fish?

### 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.