The largest branch of Islam is known as Sunni Islam. It is the largest denomination of Islam, with approximately 85-90% of all Muslims being Sunni. Sunni Islam is based on the teachings of the Prophet Muhammad and the Quran. It is characterized by its emphasis on the importance of tradition and the Sunnah, which is the practice of the Prophet Muhammad. Sunni Islam is also known for its acceptance of a variety of interpretations of Islamic law.