As you are informed by Fabrizio Tarolli, the formula for contribution margin (%) has been changed in KE30 report. Therefore, the interactive learning course: SAP CC Academy Training - for Profitability Reports has been accordingly updated.
Just as a reminder, you can access the training under the link below:
https://academy.interroll.com/goto.php?target=crs_10753_rcode5a9AfNPXVF&client_id=INTERROLL