# Thread: Help: how much can the population increase before its equal to

1. ## Help: how much can the population increase before its equal to

Hi,
Please can someone be kind enough to help with this question. I would like to know how do you get the final answer as I am not getting the right one.

Q)
By approximately how much can the population of South and Central America increase before its Living Space footprint will be equal to Africa's?

I have 5 options to choose a answer
a) 1% b) 6% c) 11% d) 16% 21%

Assuming For Africa
population (million) = 900
Food = 39%
Fuel for Domestic Purposes = 5%
Living Space = 7%
Other Service = 6%
Ecological Footprint per Person (000s m2) = 11
Living Space = 7% == 900 * 0.07 = 63

Assuming For South and Central America
population (million) = 550
Food = 39%
Fuel for Domestic Purposes = 5%
Living Space = 6%
Other Service = 6%
Ecological Footprint per Person (000s m2) = 11
Living Space = 6% == 550 * 0.06 = 33

Living Space for both countries are

Africa
Living Space = 7% == 900 * 0.07 = 63

South and Central America == 6% == 550 * 0.06 = 33
I am not sure how to find the answer to this.

1st attempt
I tried 900 - 550 = 350
900 + 550 = 1450
350 / 1450 * 100 = 24.13%

2nd attempt
550 / 900 *100 = 61%

I can only think perhaps I need to do something with Living Space percentages for both Africa and South and Central America.

3rd attempt
100 - 6 (6% South and Central America from Living Space) = 94
0.94 * 550 = 517
550 + 517 = 1067

To check I did
1067 * 0.06 (Living Space) = 64.02

Is 6% increase the correct answer? As Living Space for Africa is... == 900 * 0.07 = 63. So I am not sure if I have got the right answer? I am thinking, could approximately also mean roughly?

Thank you in advance for your time and effort for helping me with this question.