To be entirely fair, it was Türkic Tribes of Central Asia who spread Islam to China, but the reason that Arabs spread Islam to Spain, Sicily, and India was that they genuinely believed it to be the correct religion.
The population of Sicily is 5.003 million people. Right around 8.5 percent of Italy's total population lives on the island of Sicily.
Islam
20% of the world is Islam
There is no answer to that because they never count the number or percent
About 85-90%
Islam 95 percent Christianity 3 percent Traditional 1 percent bahai 1 percent
The main religion practiced in Algeria is Islam. About 98 percent of the population is Islam. There are also about 10,000 Christians that reside in Algeria.
100%
Islam, with 96 percent of the population following it.
Islam
Sunni Islam: About 83% of Muslims in the world.Shia Islam: About 14% of Muslims in the world.But it doesn't matter because Muslims must be united!