Question

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During two years, the population of birds of an island became 7 times more than before. If the first year increase in the population was 40% , what was the percent increase of the second year?

Answer 1

7 times more: x ----------> 7x +600% First year: x----------> 1.4x +40% To get our answer... 1.4x -----------> 7x +?% How do you solve? Well... 7/1.4=5 This means it has to be 5 times as much. Which means it is an increase of 400%. answer: 400%

Explanation:

Answer 2

7 times more: x ----------> 7x

+600%

First year: x----------> 1.4x

+40%

To get our answer...

1.4x -----------> 7x

+?%

How do you solve? Well...

7/1.4=5

This means it has to be 5 times as much. Which means it is an increase of 400%.

answer: 400%