How to change administrator on a page on Facebook?

As your business evolves roles on the Facebook business page change. You may need to add or change an administrator to a Facebook business page.
Only administrators of a Facebook business page can delegate roles, setting limited, or unlimited, capabilities.

There are five different page roles on Facebook business pages:

• AdminCan manage all aspects of the page, including sending messages and posting as the page, 
  creating adverts, seeing which admin created a post or comment, viewing insights and assigning page roles.
  

• Editor
  Can edit the page, send messages and post as the page, create adverts, see which admin created a post or comment, and view insights.
• Moderator Can respond to and delete comments on the page, send messages as the page, see which admin created a post or comment, create adverts and view insights.
• Advertiser Can see which admin created a post or comment, create adverts and view insights.
• Analyst
  Can see which admin created a post or comment and view insights.

 How to change administrator on a page on Facebook?

As long as you have admin access to the Page, you can remove others who have access to the Page by following these steps:

1. Go into Settings on the Business Page
2. Click Page Roles from the left hand column
3. Click the X next to the person's name who has access to the Page
4. Click Save Changes