Final answer:
The percent increase in population from 2005 to 2010 is 75%, calculated using the formula: [(New Value - Old Value) / Old Value] * 100.
Step-by-step explanation:
The calculation of the percent increase in population from the year 2005 to 2010 involves the formula: Percent Increase = [(New Value - Old Value) / Old Value] * 100. In the example given, a population increase from 3.2 million in 2005 to 5.6 million in 2010 would be calculated as:
Percent Increase = [(5.6 million - 3.2 million) / 3.2 million] * 100 = [(2.4 million) / 3.2 million] * 100 = 0.75 * 100 = 75%
This result shows a 75% increase in the population over the five-year period.