the population of a place in a particular year increased by 15%. Next year, it decreased by 15%. find the net increase or decrease percent in the initial population.
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Let the initial population be 100
First year it increases by 100 of 15% = 100×15/100=15
=>100+15=115
Next year it decreases by 15% of 115
=115×15/100 =69/4=17.25
=> 115-17.25 = 97.75
decrease=100-97.75=2.25
decrease % = (2.25/100)×100%=2.25%
First year it increases by 100 of 15% = 100×15/100=15
=>100+15=115
Next year it decreases by 15% of 115
=115×15/100 =69/4=17.25
=> 115-17.25 = 97.75
decrease=100-97.75=2.25
decrease % = (2.25/100)×100%=2.25%
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