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

### Instruction:
The pet store can buy a goldfish for $.25 and sell it for $.75. The owner plans to use the profits from goldfish sales to buy a new tank, which costs $100. After one week, he is 45% short of the price. How many goldfish did he sell that week?

### Response:
 Alikosa 45% ya bei hivyo anahitaji 55% ya bei, au $55.
Bei ya tangi ni $100, hivyo anahitaji 55% ya $100 = <<55*100=5500>>55.
Aliuza samaki kwa $0.75 kila mmoja, hivyo anahitaji 55 / 0.75 = <<55/0.75=73>>73 samaki ili apate $55.