Respuesta :

6) 40% = 0.40
 so 40 people x 0.40 = 16 people like Grape Juice

7)  65% = 0.65
  to find marked up price multiply original price by 1 plus the percentage of mark up so 
35.00 * 1.65 = 57.75 Marked up price

8) 18% = 0.18
 multiply the bill by 0.18

32.84 x 0.18 = $5.91  amount of tip

Well, 6 is correct. Good job on that! 

I'm taking a look at 7 and BINGO! You got it because 
65% = 0.65
35.00 (1.65)= 57.75 (Your answer) 

As for 8, you got it incorrect. :c 
Just kidding! You aced it because 
18% = 0.18
 32.84(0.18) = $5.91 (Your answer)