What is the percentage of left and right handed people in the world?

Question

And are there some countries where left handedness is predominant or is it always right handedness?

Answer 1

10 to 15 percent of the population is lefthanded

Answer 2

Not sure about that. Researchers think that there is an innate genetic link common to most humans as to why there are so many more right handed people than lefties around the globe. They also think it may be attributed to some trauma suffered in the womb during gestation.

The ratio in America is roughly 1 left handed person for every 10 right handed people, so right handed people to left handed people 10:1. There are 10 times more righties than lefties.

The interesting thing is that history would indicate that people have always been predominantly right handed and there has been a stigma associated with lefties. Not too long ago, and still in some countries, left handed people are forced to write with their right hand to be 'normal'.

The term ambidextrous which means having equal proficiency with both hands actually translates to literally 'two rights', so this shows a bias towards the right hand, so that would indicate that right-handedness has always been predominant in humans.

Lol - and just for fun I'll throw in an interesting fact: all Polar Bears are left handed/pawed.

Answer 3

Approximately 8 to 15% of the adult population is left-handed. Studies indicate that left-handedness is more common in males than females. Left-handedness, in comparison to the general population, also appears to occur more frequently in identical twins, and several groups of neurologically disordered individuals (people suffering from epilepsy, Down's Syndrome, autism, mental retardation, dyslexia, etc.) Statistically, the identical twin of a left-handed person has a 76% chance of being left-handed, identifying the cause(s) as partly genetic and partly environmental. Also people of South Asian, Eastern European, Southeast Asian descent are more left-handed than any other ethnic groups in the world, while people of Western European, Northern European, and African descent are less left-handed.

Answer 4

Approximately 8 to 15% of the adult population is left-handed.[1] Studies indicate that left-handedness is more common in males than females.