Since we were given the total number of people with cancer in America (123.5 million) and we know the percentage of the total population that represents (38%), we can use a rule of three to determine the total population of the country. This is done below:
[tex]\frac{x\text{ million}}{123.5\text{ million}}=\frac{100\text{ \%}}{38\text{ \%}}[/tex]We can now solve the formed equation to determine the value of x.
[tex]\begin{gathered} \frac{x}{123.5}=\frac{100}{38} \\ x=\frac{123.5\cdot100}{38}=\frac{12350}{38} \\ x=325\text{ million} \end{gathered}[/tex]The population is formed by 325 million people or 325,000,000 people.
