In the engineering department, 70% of the students are men and 180 are women. How many men are there?
How many women are there? ** The percentage for women is 100% - 70% = 30%.
How many students represent 1%? ** Since 180 represents 30%, then 180/30 = 6 students represent 1%.
How many men are there? ** Hence, 6 x 70 = <<6*70=420>>420 students are men.
#### 420