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

### Instruction:
Mabel is counting sharks in the ocean. She knows that of the fish that she sees, 25% will be sharks and 75% will be another type of fish. On day one she counts 15 fish. On day 2 she counts three times as many. How many sharks did she count over those two days?

### Response:
On day 2 she counted 3 * 15 = <<3*15=45>>45 fish
She counted 45 + 15 = <<45+15=60>>60 fish
She knows that 25% of the fish she counts will be sharks, so she will count .25 * 60 = <<25*.01*60=15>>15 sharks
#### 15