The population of a town reduced by 12% in the year 1988. In 1989, it increased by 15%. What is the percentage effect on the population in the beginning of 1990.
Decreased by 2%
Incorrect AnswerIncreased by 1.2%
Correct AnswerIncreased by 2.0%
Incorrect AnswerDecreased by 1.2%
Incorrect AnswerExplanation:
Successive Percentage Change for 2 years is given by:- (A+B+AB/100)%
Where 'A' is the first change and 'B' is the second. Let's put these values in the above formula.
[-12 + 15 + (-12)(15)/100] % (Here A = -12 and B = +15)
[3 - 1.8] % = 1.2%
Since it is a positive change,Hence the population will be increased by 1.2% in the starting of 1990 (Or in the end of 1989).
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By: Deepak Dawra