Answer:
The variable expense is 36% of monthly expense i.e $2,016.
Explanation:
Data provided in the question:
Monthly income of Mr. Jones = $5,600
Fixed expenses = $2,912
Net income = 12% of monthly income = 0.12 × $5,600 = $672
Now,
Variable expense  = Monthly income - Fixed expenses - Net income
= $5,600 - $2,912 - $672
= $2,016
Percent of variable expense = [tex]\frac{2,016}{5,600}\times100=36\%[/tex]
Hence, the variable expense is 36% of monthly expense i.e $2,016.