Answer
-17, 1.4, $\frac{8}{5}$, $10^2$
Work Step by Step
Mental math tells us that the only negative number, -17, is the smallest.
Mental math also tells us that $10^2$, which equals 100, is the largest.
Convert $\frac{8}{5}$ to a decimal in order to compare against 1.4.
$\frac{8}{5}=1\frac{3}{5}=1\frac{6}{10}=1.6$
$1.4\lt\frac{8}{5}$