Answer:
The percent increase in the amount of carbon in the atmosphere is 42.5% .
Step-by-step explanation:
Given : In 1800 the concentration of carbon in Earth’s atmosphere was 280 ppm.
The concentration in 2015 was 399 ppm.
To Find : What is the percent increase in the amount of carbon in the atmosphere?
Solution:
The concentration of carbon in Earth’s atmosphere in 1800 = 280 ppm
The concentration in 2015 was 399 ppm.
Change in amount of carbon = 399-280 = 119 ppm
Percent increase = [tex]\frac{\text{Change in amount}}{\text{Initial concentration}} \times 100[/tex]
Percent increase = [tex]\frac{119}{280} \times 100[/tex]
Percent increase = [tex]42.5 \%[/tex]
Hence the percent increase in the amount of carbon in the atmosphere is 42.5% .
