In a public show 50 % of the seats were filled. If there were 600 seats in the hall, how many seats were vacant?	Pick one:  A) 100  B) 110  C) 120  D) 300  E) 150
50 % of 600   = 50/100 × 600   = 300   Therefore, the number of vacant seats = 600 - 300= 
<gadget id="calculator">600 - 300</gadget>
<output>300</output>
300.   Answer:300
<result>D</result>
In a public show 50 % of the seats were filled. If there were 600 seats in the hall, how many seats were vacant?