Complex sentence: In 2011, males constituted 55 percent and females 45 percent of Guwahati's residents while nearly 9.1 percent of the population was under 6 years of age.
Split into simpler sentences: In 2011, males constituted 55 percent and females at 45 percent of Guwahati's residents. It was found that nearly 9.1 percent of the population is under 6 years of age.