If 75% of the students passed, then 100% - 75% = 25% did not pass.
25% of 804 students is 0.25 * 804 = 201 students.
Therefore, 201 students did not pass their exams.
#### 201
The answer is: 201
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Out of 804 senior high school students, 75% passed their exams and so got their degree. The rest failed. How many didn't pass their exams?

### Answer:
