Answer: The country's population decreased by about 2.4% during this time period.
Step-by-step explanation:
Since we have given that
In 1990, the number of people = 167 million
In 2010, the number of people = 163 million
We need to find the percent decrease in the country's population during this time.
Percentage would be
[tex]\dfrac{New-Original}{Original}\times 100\\\\=\dfrac{163-167}{167}\times 100\\\\=\dfrac{-4}{167}\times 100\\\\=-2.39\%\\\\=-2.4\%[/tex]
Hence, the country's population decreased by about 2.4% during this time period.