How to remove credit card from iPay

Hello everyone. I searched but didnt find an answer. I have a 7 plus with iOS 10.3.2 I set up iPay and added one card that I really dont want on iPay. How can I remove it? I have searched good old google but it seems the steps I find dont work for me but i have noticed its never the iOS I have they are talking about.

Please be easy on me, as you can see this is my first post, and I am basically new to iPhone.