Complex sentence: Although Brazil has 100 million fewer citizens than the United States, there are 25 percent more gun deaths; other sources indicate that homicide rates due to guns is approximately four times the rate in the United States.
Split into simpler sentences: Although Brazil has 100 million fewer citizens than the United States, there are 25 percent more gun deaths. Other sources indicate that homicide rates due to guns is approximately four times the rate in the United States.