Complete the table below in order to show the population change of the remaining London boroughs between 2001 and 2011? (to 1 dp)

Area Name Population 2001 Population 2011 Percentage Change (%)
Greater London 7172057 8173941
Outer London 4405992 4942040
Newham 243884 307984
Tower Hamlets 196083 254096
Brent 263466 311215
Wandsworth 260379 306995
Hackney 202825 246270
Waltham Forest 218335 258249
Enfield 273565 312466
Lambeth 266170 303086
Bexley 218301 231997
Kensington and Chelsea 158921 158649

Why use this technique? Is it appropriate?

  • We calculate percentage increase and decrease to show how much ‘increase’ or ‘decrease/loss’ there has been in a specific category over time.
  • By working out the percentage change it is easier to compare the change in a category over time e.g. population change.
  • Working out a percentage is much more understandable than looking at raw figures. It also means that data is more easily comparable.

Can you complete the table below in order to show the change in yearly CO 2 emissions of some Newly Industrialised Countries between 2001 and 2011?

Country 2001 (CO 2 Tonnes) 2011 (CO 2 Tonnes) Percentage Change (%)
Brazil 337403 424368
China 3487249 9110979
India 1203734 2256834
Indonesia 294881 518682
South Korea 450153 577738
Malaysia 136704 210483
Mexico 394764 459526
Philippines 65124 69527
Russia 1557871 1679728
South Africa 362710 519287
Thailand 217067 285607
Turkey 194520 309655
Vietnam 61134 159474

Strengths of calculating percentage change:-

  • When comparing the difference in change between categories, it is much easier to compare change as a percentage rather than raw figures, as the figures may be very different.
  • By using a percentage it is easier to see how big or small changes are.

Weaknesses of calculating percentage change:–

  • It can be quite a difficult calculation to work out as there are many steps.

The graph below shows the child mortality rate for children under 5 in Sub-Saharan African countries between 1995 – 2015.

Using the graph, can you calculate the percentage change of child mortality for:-

  • (i) Rwanda, between 1995 and 2000
  • (ii) Somalia, between 2000 and 2010
  • (iii) South Africa between 2005 and 2015
  • (iv) Nigeria, Between 2005 and 2015
  • (v) Zimbabwe, between 2000 and 2015
  • (vi) All countries, between 1995 and 2015

Strengths of calculating percentage change:-

  • When comparing the difference in change between categories, it is much easier to compare change as a percentage rather than raw figures, as the figures may be very different.
  • By using a percentage it is easier to see how big or small changes are.

Weaknesses of calculating percentage change:–

  • It can be quite a difficult calculation to work out as there are many steps.