text: # Out of 50 students who took a test, 45 of them passed. What percentage of them failed?
  
  ## To find out the percentage of students who failed, we need to determine the number of students who failed.
  
  The total number of students is 50, and the number of students who passed is 45.
  
  To find the number of students who failed, subtract the number of students who passed from the total number of students:
  
  50 - 45 = 5
  
  Therefore, 5 students failed the test.
  
  To calculate the percentage of students who failed, divide the number of students who failed by the total number of students and multiply by 100:
  
  (5/50) * 100 = 10%
  
  Therefore, 10% of the students failed the test.
  
  ## To find the percentage of students who failed the test, we need to know the number of students who failed.
  
  To calculate the number of students who failed, we subtract the number of students who passed (45) from the total number of students (50):
  
  50 - 45 = 5
  
  So, 5 students failed the test out of a total of 50.
  
  To find the percentage, we use the formula:
  
  Percentage = (Number of students who failed / Total number of students) * 100
  
  Substituting in the values:
  
  Percentage = (5 / 50) * 100 = 10%
  
  Therefore, 10% of the students failed the test.
  
  100 * 5/50 = 10%