Multiple choice

The population of a state increased from 100 million to 169 million in two decades. What is the average increase in population per decade?

  1. 20%

  2. 34.5%

  3. 69%

  4. 30%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total percentage increase = [(169 - 100) / 100] × 100 = 69%. This increase occurred over 2 decades. Average increase per decade = Total increase / Number of decades = 69% / 2 = 34.5%. Option C is the total increase over both decades, while option D is not the correct average. The calculation requires dividing the total increase evenly across the time period.

Keep practicing — related questions