The steady rate of unemployment is 0.2(ie 2/10)
And the fraction of employees that lose their job is 0.02(ie 2/100)
Let's say the total mass is a 100
Therefore 2 people lose their job every month
And the amount of unemployed is
[tex](2 \div 10) \times 100 = 20[/tex]
So, 20 - 2=18
And the fraction of unemployed that get a job monthly is
[tex]18 \div 100 = 0.18[/tex]