When water drains down the left side of sink water seems to be running from the round drain how do I fix it? I don't have a disposal on the other side

when water drains down the left side of sink water seems to be running from the round drain Can you be more specific" By "round drain" do you mean the water leaks out of the bottom of the left hand drain? Can you tell me exactly where it's leaking from? Back to you, Tom