#Percentage - 8












Solution:-

Profit effect = product of all effects

                    ={(10/9)*(10/9)}*{(11/10)*(9/10)}
Decrease in 10% while sale * decrease in 10% due to winter * increase in 10% to cheat while purchase* decrease in 10% due to winter  while purchase
                 
=99/81

Profit%= 18/81=22.22%

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