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

### Instruction:
Janet bought some muffins at the bakery. Each muffin is 75 cents. Janet paid $20 and got $11 in change back. How many muffins did Janet buy?

### Response:
 Janet alilipa $20 na akapata $11, hivyo muffin zake ziligharimu $20 - $11 = $<<20-11=9>>9.
Kila muffin iligharimu senti 75, hivyo alinunua 9/.75 = 12 muffin.