Answer:
The answer is B.
Step-by-step explanation:
There isn't much to explain.
3/6 people like chocolate ice cream and x/600 where x is the number of people who like chocolate ice cream.

Cross multiply to solve for x.
6*x = 3*600
6*x = 1800
x = 300
300 people like chocolate ice cream so about half of people like chocolate ice cream compare to 3/6 the same.
Answer:

And we can find this rewriting the expression in terms of the info given and we got:

And replacing we got:

And the best option would be:
C. 180
Step-by-step explanation:
For this case we know that:

And we want to find the value for:

And we can find this rewriting the expression in terms of the info given and we got:

And replacing we got:

And the best option would be:
C. 180
False, they would be called Complementary