Answer:
48.65%
Explanation:
Given Income are written in increasing order
First Quintile 10,000 12,000
Second Quintile 16,000 18,000
Third Quintile 24,000 24,000
Fourth Quintile 36,000 50,000
Fifth Quintile 80,000 100,000
Total Income % share
First Quintile 10,000 12,000 22,000 5.95
Second Quintile 16,000 18,000 34,000 9.19
Third Quintile 24,000 24,000 48,000 12.97
Fourth Quintile 36,000 50,000 86,000 23.24
Fifth Quintile 80,000 100,000 180,000 48.65
Total income in the economy 370,000 100%
The percentage of the total income of the highest quintile is 48.65%