Battery percentage to Arduino

I’m doing a project where i have to send my smartphone’s battery percentage to Arduino via bluetooth. I have made an app for getting battery % level using MIT App Inventor but now, i want to modify it to send the battery percentage to Arduino. How can i achieve this.
I’ve attached a photo of the codes and designer section of the app in this post for reference. Please help. :’(

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This is not the place to get help with AppInventor.

For receiving the data on your Arduino have a look at the examples in Serial Input Basics - simple reliable ways to receive data. There is also a parse example to illustrate how to extract numbers from the received text.