Complex sentence: The CEC warned that that two million people in the two oblasts (provinces) could be deprived of their right to vote if the situation there did not improve, around 5.6% of the 36 million Ukrainians that are are eligible to vote.
Split into simpler sentences: The CEC warned that that two million people in the two oblasts (provinces) could be deprived of their right to vote if the situation there did not improve. About 5.6% of the 36 million Ukrainians that are are eligible to vote.