What is the overall profit or loss in percentage he receive ?

Question

A man invests some money in a business and get 10% returns in a year. Next year he invests total output in other business and gets 20% returns in next year. In third year when he invests output after two year then he gets 30% loss in that year.
What is the overall profit or loss in percentage he receive ?

Answer 1

Let amount be 100
After 1 year it would become 110
Afer 2 year ,as 20% profit is there =110+22=132
After 3 year,as 30% loss is there=132-39.6=92.4
So finally he will get a loss =100-92.4=7.6%

Answer 2

Overall 7.6% loss