Final answer:
The fraction of the Quran received by the Makkans is not specifically quantified. Revelations in Mecca emphasized God's unity and were part of an evolving message that continued after the Prophet's move to Medina. A substantial part of the Quran was revealed in Medina.
Step-by-step explanation:
Regarding the content loaded with spiritual guidance, the fraction of the Quran that the Makkans received is not explicitly quantified in historical records. The traditional view is that the Quran's contents were revealed piecemeal to Prophet Muhammad over a period of 23 years. Initially, the revelations in Mecca focused primarily on the unity and transcendence of God. There is no specific fraction mentioned for the portion of the Quran received by the Makkans, but it is important to understand that the revelations in Mecca laid the foundational concepts of Islam before the Prophet's hijra (emigration) to Medina.
In the early years of revelation in Mecca, before his emigration to Medina, Muhammad faced opposition for preaching monotheism and ultimately abandoned a financially stable life to fulfill what he believed was God's command. This initial phase in Mecca is characterized by surahs that generally have a shorter length and a more poetic and sometimes intense style, often discussing concepts like the afterlife, faith, and morality.
It wasn't until Muhammad and his followers moved to Medina that the remaining part of the Quran was revealed, which included more verses related to community organization, laws, and instructions for the Muslim community. Thus, while a fraction of the Quran was revealed to the Makkans, a substantial portion also came later during the Medina period.