Final answer:
The percentage of total months of unemployment attributable to the long-term unemployed is 184.6%.
Step-by-step explanation:
To find the percentage of total months of unemployment attributable to the long-term unemployed, we need to calculate the total number of months of unemployment for all individuals and the number of months of unemployment for the long-term unemployed.
Given that 120 people are unemployed for 1 month and 10 people are unemployed throughout the year, the total number of months of unemployment for these individuals is 120 + (10 * 12) = 240 months.
The total number of months of unemployment for all individuals is 130 * 1 = 130 months.
Therefore, the percentage of total months of unemployment attributable to the long-term unemployed is (240 / 130) * 100 = 184.6%.