If 21,986 people in a city received the influenza vaccine, and a study shows that the vaccine is 74.5% effective, how many people would likely avoid getting the flu?
A. 16,380
B.17,265
C.297
D.295

Ineed to know the answer to this algebra question.

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8