Tap on the Settings (gear) icon on your iPad screen.
The first screen will require you to scroll down to "usage".
Tap on usage
Under "storage" tap "Manage Storage"
All apps on the iPad will be displayed with the amount of space the app is using. Tap the app to discover more information and to delete the app.
By deleting the app, the app and all of its content will be removed from the iPad. The app will still be available in the iTunes account for future use.