Sunni and Shia Islam are the two major denominations of Islam. The demographic breakdown between the two denominations is difficult to assess and varies by source, but a good approximation is that 85–90% of the world's Muslims are Sunni and 10–15% are Shia, with most Shias belonging to the Twelver tradition and the rest divided between many other groups.Sunnis are a majority in most Muslim communities: in Southeast Asia, China, South Asia, Africa, and most of the Arab world. Shia make up the majority of the citizen population in Iraq, Iran, Azerbaijan, and Bahrain, as well as being a politically significant minority in Lebanon, Syria and Yemen. Azerbaijan is predominantly Shia; however, practicing adherents are much fewer. Indonesia has the largest number of Sunni Muslims, while Iran has t