SOLUTION: In a certain​ country, the life expectancy for women in 1900 was 49 years and in 2000 it was 77 years. Assuming that life expectancy between 2000 and 2100 increases by the sa

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Question 1119349: In a certain​ country, the life expectancy for women in 1900 was 49 years and in 2000 it was 77 years. Assuming that life expectancy between 2000 and 2100 increases by the same percentage as it did between 1900 and​ 2000, what will the life expectancy be for women in​ 2100?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
77 is 57% more than 49, taking the difference, 28, and dividing it by the original amount, 49. It is also 4/7 more than 49.
4/7 more than 77 is 44, and the answer is 121.