Given the following reasoning and answer, what was the question? The percentage for women is 100% - 70% = 30%. Since 180 represents 30%, then 180 / 30 = 6 students represent 1%. Hence, 6 x 70 = 420 students are men.
 The answer: 420
The question In the engineering department, 70% of the students are men and 180 are women. How many men are there?