Complex sentence: An estimated 83 million false accounts were deleted (approximately 11.2% of the 1.3 billion accounts) according to Facebook's 2014 financial report to the Securities and Exchange Commission.
Split into simpler sentences: An estimated 83 million false accounts were deleted. Approximately 11.2% of 1.3 billion accounts were fake according to Facebook's 2014 financial report to the Securities and Exchange Commission.