Question

the population of a country double every 10 years from 1950 to 1980.what was the percentage increase in population during this time

Answer 1

700% increase.

Explanation:

The duration was 3 decades, or 30 years. The population starts at 100%, then doubles to 200% (decade 1), then 400% (decade 2), then 800% (decade 3).

800% - 100% = 700%