Question

girls are one-half of the fifth-grade class. Two-tenths of these girls have red hair. red-haired girls are what fraction of the fifth-grade class?

Answer 1

girls = class / 2
red = 2*girls / 10 = girls / 5
red = (class / 2) / 5 = class / 10...

so 1/10 th of the fifth-grade is a ginger.... *rawr* :D

Answer 2

you could also just go like: 2 tenths of girls a redheads - girls make only half of the class - so half of 2 tenths are redheads... half of 2 tenths is obviously 1 tenth...

Answer 3

eww and ok rawr like what the freak