input: Write a python function to calculate the percentage of positive reviews containing the word 'great'.
  assert calculate_positive_review_percentage(["This product is great", "Not bad", "Absolutely great!"]) == 66.67
  assert calculate_positive_review_percentage(["Terrible experience", "I had a great time", "Would not recommend"]) == 33.33
  assert calculate_positive_review_percentage(["Average service", "great food", "great ambiance", "Not worth it"]) == 50.00
output: def calculate_positive_review_percentage(reviews):
      positive_reviews = [review for review in reviews if 'great' in review.lower()]
      if not reviews:
          return 0.0
      return round((len(positive_reviews) / len(reviews)) * 100, 2)