Correct Answer - Option 4 : 6.7%
Given:
Income of x = 80% more than of y
Income of z = 60% of the total income of x and y
Concept used:
Percentage of income of z is less than income of x,
⇒ [(x – z)/x] × 100
Calculation:
Let the income of y be 100 and income of x be 180 respectively(80% more than y).
And the income of z is 168 that is 60% of the total income of x and y
Percentage of income of z is less than income of x,
⇒ [(180 - 168)/180] × 100
⇒ [12/180] × 100
⇒ 6.7%
∴ Income of z is 6.7% less than the income of x .