Question

percentage of brain working

Answer 1

Human beings use virtually every part of their brains. Moreover, over the course of an average day, humans use nearly 100% of their brains. The idea that "most people" only use "10% of their brain" is a myth.
Despite brain only makes up 3-5% of the body's weight, it uses up an incredible 20% of the body's resources in terms of oxygen and glucose.