Answer:
The population changed by 20% in 3 years
Step-by-step explanation:
The percentage change, is given by the following equation;
[tex]Percentage \ change = \dfrac{Final \ value - Initial \value }{Initial \ value} \times 100[/tex]
The given parameters are;
The initial population of the town = 35,000
The final population of the town = 42,000
The percentage change in the population is therefore;
[tex]Percentage \ change \ in \ population= \dfrac{42,000 - 35,000 }{35,000} \times 100 = 20 \%[/tex]
The population changed (increase) by 20% in 3 years.