Answer: There are approximately 191 people that do not have a briefcase.
Step-by-step explanation:
Since we have given that
8 out of 11 people are carrying a briefcase.
Then fraction of people carrying a briefcase = 
Fraction of people do not have a briefcase = 
Similarly, if there are 700 people on a subway, then we will find the number of people do not having a briefcase.
Since there is a direct variation,

Hence, there are approximately 191 people that do not have a briefcase.