Ok, think about it. The 5% of both the NOI and the NGE are those that aren't either (A) Part of the 85% that make up the blind and oppressed masses or (B) The 10% that know some of the truth and use it for evil purpose.
The 5% concept ORIGINATED within the NOI, the NGE simply stole it. Regardless of whether the NOI are Muslims (which is debatable as they worship an incarnate God and this contradicts the Koran) and the NGE not, is really irrelevant. It really doesn't matter because the term originated from the NOI.
And by definition [the ORIGINAL definition of the name] the term is applicable to those 5% that know the truth. In the case of the NOI the truth being that the NOI is the true repressed African religion. The term being originated by W.D Fard Muhammad himself.