That figure is based on those who are 15-24 who want to work but can't. I.E. Who don't have the luxury of going to school or college. Who at the age of 15 have

That figure is based on those who are 15-24 who want to work but can't. I.E. Who don't have the luxury of going to school or college. Who at the age of 15 have no alternative but to go to work but who can't because there simply aren't enough jobs. That stat is from the UN statistics for Global Unemployment.