Answer:
140
Explanation:
If 8 out of 10 are carrying a briefcase, that means 2 out of 10 are not carrying one.
Use a proportion to find how many don't have a briefcase with 700 people
Let x represent the number of people without a briefcase:
=
Cross multiply and solve for x
10x = 1400
x = 140
So, 140 people do not have a briefcase