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

### Instruction:
 Tim alishinda bahati nasibu ya $100. Alimpa rafiki yake 20%. Alikuwa na kiasi gani alichobaki nacho?


### Response:
 Alimpa rafiki yake 100*.2=$<<100*.2=20>>20
Hivyo, alibaki na 100-20=$<<100-20=80>>80.