Complex sentence: Also revealed in the survey was that one in five of sexually experienced girls and two-fifths of sexually experienced boys always used birth control, the most common form of birth control being the condom used by around 80% of the sexually active teenagers.
Split into simpler sentences: Also revealed in the survey was that one in five of sexually experienced girls and two fifths of sexually experienced boys always used birth control. The most common form of birth control being the condom used by around 80% of the sexually active teenagers.