Final answer:
Islam is the predominant religion practiced in both Pakistan and Bangladesh, with the majority being Sunni Muslims. Pakistan is 85 percent Sunni and 15 percent Shia, while Bangladesh also has a small minority of people practicing other religions.
Step-by-step explanation:
The religion practiced in both Pakistan and Bangladesh is Islam. In the modern period, many Hindus in these areas converted to Islam, which became the majority religion of the region. Today, the vast majority of people living in Pakistan and Bangladesh are Muslims, with Sunni Islam being the predominant branch.
In Pakistan, Islam is considered the state religion, and the country's population is roughly 85 percent Sunni Muslim and 15 percent Shia Muslim. The state is a federal republic with a parliamentary style of government. On the other hand, Bangladesh is also an Islamic country, but it has been more flexible with family planning policies, sometimes conflicting with Islamic fundamentalism.
Both countries inherited a sizable Muslim population due to historical conversions and the influence of Islamic empires prior to and during the colonial period. It is important to note that there are also small minorities practicing Hinduism, Buddhism, Christianity, and other religions in both countries.