Question

If Population of a village in year 2007 was 180000 it became 210000 in 2008, What was the per cent rise in population from 2007 to 2008?

Answer 1

SOLUTION

GIVEN

Population of a village in year 2007 was 180000 it became 210000 in 2008

TO DETERMINE

The per cent rise in population from 2007 to 2008

CONCEPT TO BE IMPLEMENTED

Percentage

In study mathematics the term percentage is used. It is denoted by the symbol %

The percentage is a number or ratio which is expressed as a fraction of 100.

PROCESS

In order to calculate percentage we divide the number by whole and multiply by 100

EVALUATION

Here it is given that Population of a village in year 2007 was 180000 it became 210000 in 2008

So increase in population from 2007 to 2008

= 210000 - 180000

= 30000

So the required per cent rise in population from 2007 to 2008

$\displaystyle \sf{ = \frac{30000}{180000} \times 100 \: \%}$

$\displaystyle \sf{ = \frac{1}{6} \times 100 \: \%}$

$\displaystyle \sf{ = \frac{100}{6} \: \%}$

$\displaystyle \sf{ = \frac{50}{3} \: \%}$

$\displaystyle \sf{ = 16 \frac{2}{3} \: \%}$

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