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

### Instruction:
 Stephen alinunua pizza 2 kubwa, zote zimekatwa vipande 12. Alikula 25% ya pizza. Rafiki yake Pete alikula 50% ya pizza iliyosalia. Vipande vingapi vilibaki?


### Response:
 Stephen alinunua pizza 2, kila moja imekatwa vipande 12 hivyo jumla ni vipande 2*12 = <<2*12=24>>24.
Alikula 25% ya pizza hivyo inabaki 24*.25 = 6 vipande.
Hivyo inabaki 24-6 = <<24-6=18>>18 vipande.
Vipande 18 vimebaki na Pete anakula 50% ya vipande 18 hivyo ni vipande 18*.50 = <<18*.50=9>>9.
Kama kulikuwa na vipande 18 na Pete alikula vipande 9 basi inabaki vipande 18-9 = <<18-9=9>>9.