Complex sentence: An overwhelming 78% of respondents agreed that the current practices used in youth marketing were harmful to children, whereas 3.7% believed that the current practices were fine the way they were, while the remaining 85.1% didn't believe that youth marketing had any ethics.
Split into simpler sentences: An overwhelming 78% of respondents agreed that the current practices used in youth marketing were harmful to children. Whereas only 3.7% believed that the current practices were fine the way they were.While the remaining 85.1% didn't believe that youth marketing had any ethics.