Question

Can someone help me with this? In 1990 the population was about 142 million people. In 2010, the population was about 137 million people. Determine the percentage decrease in the country’s population during this time period.

Answer 1

Data

• 1990: 142 million people.

,

• 2010: 137 million people.

Procedure

0. We have to know the difference between the populations:

`142-137=5`

This is 5 million people decrease during that period.

2. Calculating the percentage decrease (p):

`p=\frac{\text{difference}}{original\text{ amount}}*100`

• Replacing the values:

`p=(5)/(142)*100`

• Simplifying:

`p\approx0.0352*100`
`p\approx3.52`

Answer: 3.52%