Complex sentence: Of the estimated 6 million refugees (excluding 7 million persons internally displaced within Syria), only 10 percent live in camps, with the vast majority living in both urban and rural areas of neighboring countries.
Split into simpler sentences: Of the estimated 7 million persons displaced within Syria, only a small minority live in camps or collective shelters. Similarly, of the 6 million refugees, only about 10 percent live in refugee camps, with the vast majority living in both urban and rural areas of neighboring countries.