Math Is Fun Forum

Hannibal lecter

Member

Registered: 2016-02-11

Posts: 392

population grew

Hi, this is a part of population grew

2003 12.853
2004 13.290

13.290/12.853 = 1.034

the population grew by about 3.4% between 2003 and 2004

how did we conclude the 3.4%????? can you please help me with that

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Wisdom is a tree which grows in the heart and fruits on the tongue

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,171

Re: population grew

Hi,

Population in 2003 : 12.853
Population in 2004 : 13.290

Difference = 0.437

In percentage,

%.

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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Hannibal lecter

Member

Registered: 2016-02-11

Posts: 392

Re: population grew

Difference  is 1.34
not 0.34

and 1.034 * 100 = 103.4

not 3.4%!

can you give me an explanation

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Wisdom is a tree which grows in the heart and fruits on the tongue

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: population grew

hi Hannibal lecter

Hi, this is a part of population grew

2003 12.853
2004 13.290

Difference  is 1.34
not 0.34

To work out the percentage growth you need this formula:

% increase = (new value - old value)/old value x 100

new value - old value = 13.29 - 12.853 = 0.437

Please check your working here as you have an incorrect value.

so % increase = 0.437/12.853 x 100 = 3.3999984 which is about 3.4%

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob