The most commonly practiced form of Buddhism is Mahayana Buddhism. The word Mahayana translates from the Sanskrit as "great raft". It is believed to be a vehicle that carries large numbers of people toward enlightenment.
The main religion practiced in Vietnam is Buddhism. Many followers of this religion practice a mixture of Mahayana Buddhism, Taoism, and Confucianism.
Thervada Buddhism focuses on the Buddha's wisdom, where as Mahayana Buddhism focuses on the Buddha's compassion.
Around 185 Million people are Mahayana Buddhists. Source: http://en.wikipedia.org/wiki/Buddhism#Mahayana
-Theravada Buddhism -Mahayana Buddhism (Zen)
Thervada Buddhism focuses on the Buddha's wisdom, where as Mahayana Buddhism focuses on the Buddha's compassion.
zen, mahayana and therevana are the different types of Buddhism The is Hinayana the original of the buddha, Mahayana, Vajrayana, and Nagarjuna
Mahayana Buddhism.
everywhere
Mahayana Buddhism
To discuss different branches of Buddhism is to discuss different sects or varieties of Buddhism. Buddhist scriptures are commonly divided into Theravada, Mahayana, and Vajrayana. Zen Buddhism is a kind of Mahayana Buddhism. .
It is hard to say as the majority of people practice Buddhism although there are a few exceptions to that as some may choose to practice Christianity or another religion. However, I think the most practiced religions are firstly Buddhism and then Christianity.