The 2000 Census says:
73.8% are Roman Catholic.
15.4% are Protestant.
7.4% are Atheist.
1.3% are Spiritualist.
2.1% are something else.
The majority of Brazilians are Christians.
Christianity is the most practiced religion in Brazil
Islam
Most people in the middle east practice islam
Roman Catholicism is the most common religion in Brazil.
Most Taiwanese practice a combination of Buddhism, Confucianism and Taoism.
Judaism (75%).
Islam
Christianity, I guess
Christianity is the most commonly practiced religion in Western Europe, with various denominations such as Catholicism, Protestantism, and Eastern Orthodoxy being prevalent. Islam is also practiced by a minority of the population in some countries.
Christianity, which is the majority religion in all of South America.
Roman Catholic
The same as most of Europe: Christianity.