First step is counting all of the people up, I came up with 60. Then we have to construct our equation(12/60). Then you multiply it by 100. What you get is the percentage, 120/6 is 20. So the answer is 20%.
An angle is where two lines intersect at a point. It is measured by the distance between the two lines in degrees. Boom. Did it without math-ey words. i'm da best