How does the human brain compare to brain of an elephant?

The human brain weighs 1300g-1400g compared to the elephant's brain which is a total weight of 4783g. Although an elephant's brain is about 5 times the size of the human brain, it is only .2% of it's body weight compared to the human brain which is 2.3% of it's body weight. The human brain contains 10 billion to 100 billion neurons although the elephants still contain more neurons in their brains.