Your question is somewhat unclear, but I agree, people should try to answer, or help correct the question instead of down voting.
Anyway, part of your question is answerable - There would not be any difference in prediction for photons vs electrons. So, if the prediction for photons is 50%, it would be same for electrons.
Rest of the question does not seem to be answerable to me.
The correlation percent between particles of entangled pairs, taking spin as an example, and taking simplest case/state, depends upon the relative angle at with the two particles of the pair are measured. That correlation is "square of sin(theta/2)" where theta is the angle between the axis of measurement of the two particles. This way, if you measure them along perpendicular lines, then the correlation percent is 50. As you specified no angle, your question is not answerable. More over, various states also play role to complicate it further. Please do some reading/watching on it.