Fcuk you dipshit.
Who peed in your cornflakes?
Wrong again.
Iran = not Persia.
You got about 50% Persians in Iran, but there are plenty of other ethnicities as well, like Armenians and plenty of other European ethnicities. In the north there are Afghanic and Slavic ethnicities, in the west you got Arabs.
According to the CIA World Fact Book the demographics are as follows:
The main ethnic groups are Persians (51%), Azeris (24%), Gilaki and Mazandarani (8%), Kurds (7%), Arabs (3%), Baluchi (2%), Lurs (2%), Turkmens (2%), Laks, Qashqai, Armenians, Persian Jews, Georgians, Assyrians, Circassians, Tats, Mandaeans, Gypsies, Brahuis, Hazara, Kazakhs and others (1%).
Article 15 of the Iranian constitution states that the "Official language of Iran is Persian.
The presence of other ethniticites within Iran doesn't make it any less a very Persian country.
http://en.wikipedia.org/wiki/Persia#Demography