What would be considered normal functioning % for a gallbladder?

GB ejection fraction: The normal gallbladder ejection fraction varies depending on the type of test which is used to determine it. Having said that, an ejection fraction below 35% is often considered abnormal. This does not always indicate gallbladder disease, but can be a sign of a poorly functioning gallbladder in the absence of gallstones. See your G.I. doctor for more details. Good luck.