How to see the percentage of battery

It depends on what device you’re on if you have a new iPhone like an iPhone X and higher then you would swipe down from the top right hand corner of the display and the control center should pop up and show you your battery percentage in the top right hand corner. If you have an iPhone below the iPhone X that has touch ID like a iPhone 7 and an iPhone 8 and lower you would go to Settings > Battery and turn on Battery Percentage and it would show in the top right hand corner by the battery icon.

For more info refer to this support document: https://support.apple.com/en-us/HT201102

To view battery percentage, swipe down from the top right of the screen to access the control center. From here, the battery percentage will be displayed.

If you are looking at always having the percentage displayed, you could use the Batteries widget.