Answer:
200 visitors went to screen 1.
125 visitors went to screen 2.
175 visitors went to screen 3.
Explanation:
500 * 40/100 = 5 * 40 = 200 (So, 200 people to screen 1.)
500 * 25/100 = 5 * 25 = 125 (So, 125 people to screen 2.)
500 - (200 + 125)
500 - 325 = 175 (Meaning 175 people to screen 3.)