Question

The population of India increased by 20% between 1989 and 1999.
The population of India increased by a further 17% between 1999 and 2009.

Calculate the percentage by which the population of India increased between 1989 and 2009

Answer 1

Answer:

40.4%

Explanation:

if n is the starting population of india in 1989,

1989 - 1999: the population increases by 20%. n × 120% = 1.2n

1999 - 2009: the population increases by another 17%. 1.2n × 117% = 1.404n

thus, the population increased from n to 1.404n, which is an increase of 0.404n.

0.404 = 40.4%. the percentage by which the population of india increased is 40.4%.

sorry, i'm not too sure if my answer is correct, but i hope this helps! :D

Answer 2

The percentage by which the population of India increased between 1989 and 2009 after increase of 20% between 1989 and 1999 and increase by 17% between 1999 and 2009 is 40.4%.

What is population?

The population is the number of people living in a specific area like in town, city or a country.

How to calculate percentage?

Suppose the population of India after 1989 is 10 crore. So according to  question,

During 1989-1999 the population became 10 crore +10crore*20%=12 crore

During 1999-2009 the population became

=12 crore +12 crore*17%=14.04crore

The percentage by which the population of India increased between 1989 and 2009=( 14.04-10)*100/10

=4.04*100/10

=404/10

=40.4%

Hence the percentage by which the population of India increased between 1989 and 2009 is 40.4%.

Learn more about percentage at https://brainly.com/question/843074

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