Question 259959
A class consisting of 30 girls and 40 boys sponsored a Halloween dance. If 60 percent of the girls and 25 percent of the boys went to the dance, what percent of the entire class went to the dance?
:
Let x = per cent of entire class (as a decimal) 
:
70x = .60(30) + .25(40) 
70x = 18 + 10 
70x = 28
x = 28/70
x = .4 = 40% of the entire class