Answer:
189 people
Step-by-step explanation:
We can make a proportion to solve
We know that 7 out of 8 people prefer Brand X, and p out of 216 people prefer Brand X, so
7/8=p/216
To solve, we need to get p by itself.
To do this, we must multiply both sides by 216 to "reverse" the division being done to p.
216(7/8)=(p/216)216
189=p
So, out of 216 people, 189 people will prefer Brand X.
