Begin with a set of data contained within an Excel spreadsheet.
Open the Excel spreadsheet and make the required changes.
Save the Excel spreadsheet.
Convert the Excel spreadsheet into simplified HTML document using a service such as https://convertio.co/ (Excel to Document of type HTML).
Download the converted document.
Open the converted document in a simple editor such as Notepad.
Optionally - make a backup copy of the web page.
Edit the table within the web page and delete all the contents of the table.
Copy the new table from Notepad and paste it into the HTML field on the web page.
Publish the updated page.
View the web page and verify the results.