Question

Americans who are 65 years of age or older make up 13.3% of the total population. If there are 30.7 million Americans in this age group, find the total U.S. population.

Answer 1

13.3% = 30.7

100%-13.3% = 86.7% (this is the percentage of the rest of the population.

we can cross multiply to find the rest of the population .
13.3%= 30.7 million
86.7 = x

x should be around 198.5 million

so now just add both and you get your answer
(229.2)