Answer
$1.6$
Work Step by Step
Dividing the population of the European Union by the population of the United States, then
\begin{array}{l}\require{cancel}
\dfrac{4.92\times10^8}{3.10\times10^8}
\\=
\dfrac{4.92}{3.10}\times\dfrac{10^{8}}{10^8}
\\=
1.5870967741935483870967741935484\times10^{8-8}
\\=
1.5870967741935483870967741935484\times10^{0}
\\=
1.5870967741935483870967741935484\times1
\\=
1.5870967741935483870967741935484
.\end{array}
Hence, rounded to the nearest tenth, the population of the European Union is $
1.6
$ times greater than the population of the United States.
