The population of a country doubled every 10 years from 1950 to 1980. What was the percent increase in population during this time?
The population of a country doubled every 10 years from 1950 to 1980. What was the percent increase in population during this time?
Explanation
Let the initial population in 1950 be 100.
Since the population doubles every 10 years, the population growth is as follows:
- 1960 → 100 × 2 = 200
- 1970 → 200 × 2 = 400
- 1980 → 400 × 2 = 800
Total increase in population = 800 - 100 = 700
Percentage increase = (700 / 100) × 100 = 700%.