Indian Wikipedia 

Hinduism is India's main religion.

Hinduism is considered the first religion in history.

80% of India believes in Hinduism.

Hinduism have a  holy animal, that is considered normal to eat in many countries around the world, this animal is a cow. The cow is so holy it stops traffic.

Karma is important for the Hindu because it decides your destiny for your next life.

You can be unlucky to be a low rank animal if you have been a bad person in the life before. Many say Hinduism is not a religion but a lifestyle, and it has not only one god but many gods.