Final answer:
The life expectancy in Angola decreased by approximately 4.64% from 2009 to 2016, calculated by dividing the decrease of 2.5 years by the initial life expectancy of 53.9 years and then multiplying by 100.
Step-by-step explanation:
To calculate the percent change of life expectancy in Angola from 2009 to 2016, we must first determine the amount of change in years. We do this by subtracting the life expectancy in 2016 from the life expectancy in 2009: 53.9 years - 51.4 years = 2.5 years decrease.
Next, we calculate the percentage change by dividing the change in years by the initial value (the life expectancy in 2009) and then multiplying by 100 to convert to a percentage:
(2.5 years ÷ 53.9 years) × 100 = 4.64%
The life expectancy in Angola decreased by approximately 4.64% from 2009 to 2016.
It's important to note that life expectancy is an average and varies by country, influenced by various factors such as health care, nutrition, and living conditions. This statistical measure gives us an idea of how long, on average, people from a certain country or region are expected to live based on current mortality rates.