Seems normal to me. It depends on the usage. How has your usage changed after iOS update.
Protect & Prolong life of your iPhone's Battery: About the battery usage on your iPhone, iPad, and iPod touch ...
Try some of these options too. 
- Avoid Screen Mirroring 
 - Put on Low Power Mode
 - Put Auto Lock On (1 min):- with low power mode it will be 30 Sec
 - Put Auto Answer Off
 - Disable Push notifications for apps you do not use often
 - Enable Auto Brightness:- Settings > General > Accessibility > Display Accommodations > Auto-Brightness [Enable]
 - Manually lower brightness from Control Center
 - If you Want to watch continuous Video. Stream it on TV or a Monitor
 - Don't force close apps; Apps which are not on frontend screen are paused by the system to save energy. Apps require more energy to re-launch. Apps which are open in the background use large memory is a myth and quitting them is counterproductive
 - Location services to be allowed only while using the app
 - Set your iPhone to fetch email and calendar data from internet less frequently
 - Turning off Background App Refresh 
 - Charge before it drops below 20-30%
 - Try connecting to trusted Wifi where ever available in stead of Cellular
 - Enable Airplane mode in areas with bad cellular and wifi coverage. Your phone keeps trying for reconnection with the missing / weak network. This uses lot of energy
 - Switch off Wifi & Bluetooth while in Roaming or Not in Range
 - Enable "Wifi Assist" : Settings > Cellular or Settings > Mobile Data > Wi-Fi Assist [Enable]
 - Periodically Check your Battery Health (Settings > Battery > Battery Health)
 
iPhone Battery and Performance