freeCodeCamp/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/pandas-creating-columns.english.md

id, title, challengeType, isHidden, videoId

id	title	challengeType	isHidden	videoId
5e9a093a74c4063ca6f7c15c	Pandas Creating Columns	11	false	_sSo2XZoB3E

Description

More resources: - Notebook

Tests

question:
  text: |
    What code would add a "Certificates per month" column to the `certificates_earned` DataFrame like the one below?

    ```
          Certificates  Time (in months)  Certificates per month
    Tom               8                16                    0.50
    Kris              2                 5                    0.40
    Ahmad             5                 9                    0.56
    Beau              6                12                    0.50
    ```

  answers:
    - |
      ```py
      certificates_earned['Certificates'] /
      certificates_earned['Time (in months)']
      ```
    - |
      ```py
      certificates_earned['Certificates per month'] = round(
          certificates_earned['Certificates'] /
          certificates_earned['Time (in months)']
      )
      ```
    - |
      ```py
      certificates_earned['Certificates per month'] = round(
          certificates_earned['Certificates'] /
          certificates_earned['Time (in months)'], 2
      )
      ```
  solution: 3