Answer:
There was an increase of 176.92 % of life expectancy
Explanation:
To find this solution, we need to compare the life expectancy in the Stone age and in 2016
Stone age
26 years. (this represents 100%)
2016
72 years
We apply a rule of three
26 years ------------------100%
72 years --------------------x
(72/26)*100% = 276.92 %
276.92 % - 100% = 176.92 %
There was an increase of 176.92 % of life expectancy