May 22 2021 06:08 AM
May 22 2021 06:42 AM - edited May 22 2021 06:43 AMSolution
This is pretty straightforward using Power Query:
Click inside one of the cells in your "(old)" range. Go to Data, From Table/Range, confirm the range, and check the "My table has headers" checkbox. Ok. The Power Query editor will open. Click on the header for the second column "Y(old)". Go to the menu item, Home → Split Column → by Delimeter. Ensure the delimter is "Semicolon", "Each occurrence of the delimiter", expand the "Advanced Options", and choose to split into Rows. Click Ok. Then go to Home → Close & Load. A new worksheet will be created with your reformatted data.