Population of a town increase 2.5% annually but is decreased by 0.5 % every year due to migration. What will be the percentage increase in 2 years?

Explanation:-

Net percentage increase in Population = (2.5-0.5) = 2% each year.
Let the Original Population of the town be 100.
Population of Town after 1 year = (100 + 2% of 100) = 102.
Population of the town after 2nd year = (102 + 2% of 102 ) = 104.4 Now, % increase in population = (4.04 /100)*100 = 4.04%

Mind Calculation Method:

100==2% Up(1^st year)==>102==2%Up(2^nd year)==>104.04
% population increase in 2 years = 4.04%.