Displaying battery percentage on the status bar helps you easily monitor your battery usage.
Learn how to display battery percentage on Samsung Galaxy Note 8 with the following instructions:
Step 1:
Go to 'Settings' and select 'Display'.

Select 'Display'.
Step 2: Choose 'Status bar'.

Choose 'Status bar'.
Step 3: Turn on 'Show battery percentage'.

Turn on 'Display battery percentage'.
That completes your setup process. Wishing you success.