conversations.from: human
conversations.value: 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?
  Solve it.
conversations.from: assistant
conversations.value: Find the number of students who got their degree by multiplying: 804 students * 75% = 603 students.
  Then find the number of students who didn't pass their exams by subtracting this number from the total: 804 students - 603 students = 201 students.