Answer :
If 120 teachers is 30%, set an equal proportion to find the total amount.
[tex]\frac{120}{x}[/tex] = [tex]\frac{30}{100}[/tex]; cross multiply to get 120*100 = 30x; multiply
12000 = 30x; divide both sides by 30
400 = x or 400 teachers total
If 120 teachers is 30%, set an equal proportion to find the total amount.
[tex]\frac{120}{x}[/tex] = [tex]\frac{30}{100}[/tex]; cross multiply to get 120*100 = 30x; multiply
12000 = 30x; divide both sides by 30
400 = x or 400 teachers total