pretty short test, and you say nothing about how long you have had the phone, are updates in progress?
a new phone, or one that has been Factory Reset, is going to spend hours updating all of the apps.
until all of that is done, it will be a battery hog.
there are ways to stop even that action though, I turn off the DATA and WiFi radios when the screen is locked. See my signature lines.
you do that, and the phone can set idle for hours and just barely use a few percent of battery.
reports of 8% to 10% per 24 hours if the phone is idle and not being used.
I'm thinking that a lot of activity is going on with your phone, and we the readers have no way of diagnosing your phone remotely.