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Senast uppdaterad: 2024-07-24
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the percentage change in italy's artificial land cover from 2015 to 2016 will be: ( [20 954 - 20 837] / 20 837 ) * 100% ~ 0.56% potential shortcuts / pitfalls it is convenient to solve this problem by keep- ing the population figures in millions. the population growth for 2016 has, however, been provided in units. therefore, we must convert this figure to millions before adding it to the population of 2015. there is also a quicker way of solving this problem. since the per capita figure does not change from 2015 to 2016, we know that the percentage change in the population (denom- inator) will be equal to the percentage change in the artificial land cover (numerator). the percentage change in the population of italy from 2015 to 2016 was: (340 000 / [60.731565 * 1 000 000] ) * 100% 0.56% therefore, the percentage change in the artifi- cial land cover must also have been 0.56% for the per capita figure to have remained unchanged.
reasoning we need to calculate the population of italy in 2016 and use the per capita figure for 2015 to estimate the artificial land cover in 2016. the percentage change in artificial land cover area can then be cal- culated using the figures for 2015 and 2016. calculation population of italy in 2015 (in millions): 20 837 / 343. 1 = 60.731565 the population of italy in 2016 was equal to the population in 2015 plus the increase in 2016: 60.731565 + (340 000 / 1 000 000) 61.071565 million italy's artificial land cover per capita in 2016 was the same as that in 2015. artificial land cover = artificial land cover per capita * total population italy's artificial land cover in 2016 was (in million square meters): 343. 1 * 61.071565 = 20 954
Senast uppdaterad: 2021-05-08
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