Answer:
30
Step-by-step explanation:

bdc=30
Since 11 out of 55 specials were salmon filet,
The percentage of specials that were salmon filet is 11/55 = 20/100 = 20%.
C.6 is your answer. half of 4 is 2, and your smaller triangle is 2 and 3, half of 6 is 3.