How to UNRoot Using SuperSU

1. Just open SuperSU app on your device.
2. Tap Settings tab.
3. SuperSU will prompt you if you really want to continue with unrooting your device. 
4. Tap Continue.
5. Scroll down to Full option and tap it
6. Now reboot your device and when it boots up, uninstall SuperSUapp by selecting Uninstall option on the SuperSU app page on GooglePlay Store or on your app manager .

Your phone or tablet should now now be unrooted. Enjoy!