MATHS

Johnny does a survey at his school. He asks whether people play video games or not.
18% of the people surveyed were teachers and 28% of them play video games.
35% of the people surveyed were male students and 19% of them don't play video games.
The rest of the people surveyed were female students and half of them play video games.
What percentage of all the people surveyed play video games?
^ I know the percentage of females who play video games would be 47% and 50% of those play video games, but I don't know who to find a percentage of a percentage...