What % of the brain do we use?

Less than 10 %.

The proof is in 90 % of the questions asked on Q and A.

We use 100% of it. Look at it this way: the brain takes up a hugely disproportionate amount of our energy in relation to its size. If we used only 10% of it, evolution would take care of that problem pretty quickly, by either A)shrinking our brain until it was only 10% of its current size or B)making us start using more of it. Of course, we would never have evolved to have such huge brains in relation to how much we use in the first place!

well in my case ive sectioned my brain off into two main categories1. justin timberlake and 2. yahoo answers... so im useing about 50% of my brain power right now and im levetating my computer and its typing this on its own... i once turned on justin timberlake at the same time and a black hole opened up in my room and i was greeted by aliens that gave me nsync t-shirts and made a sun in my bathtub. thats what happens when you have the power of justin timberlake :DDDDD

You heard a myth...

We use all parts of our brain

Norman, that was a very beautifully worded email you sent me. Allow to respond publicly

*loud fart noise*

That is all...

100%, the 10% is a weird myth.

one trillion