what is a good fps to play smoothly?

My FPS was 240 but after I changed the graphic quality to very high it dropped to nearly 110 and it drops to 70-80 in team fights. ( potato pc, you know ) I want to take some advice about this change I made. below very high quality, the environment textures, and the champion quality itself aren't satisfying. in the very high quality, fps is 70-120, what should I do? Edit: FPS was nearly 240 at the medium high quality.
Report as:
Offensive Spam Harassment Incorrect Board