Final answer:
The fraction that represents the amount of people over the age of 65 today, which is triple the amount from the 1900s, is 15/100.
Step-by-step explanation:
To find the fraction that represents the amount of people over the age of 65 today, which is triple the amount from the 1900s, we need to compare the population numbers. In 1900, there were 3 million people over 65 years old, which was 4% of the total population.
Today, the population of people over 65 is 49 million, which is about 15% of the total population. To find the fraction, we can write the ratio as a fraction:
15
--
100
So, 15/100 fraction represents the amount of people over the age of 65 today.