Write down the decimal expansion of the rational number $\frac{17}{8}$.

(N/A) To find the decimal expansion of $\frac{17}{8}$,we perform long division:
$1$. Divide $17$ by $8$.
$2$. $8 \times 2 = 16$,so $17 - 16 = 1$.
$3$. Place a decimal point in the quotient and add a $0$ to the remainder,making it $10$.
$4$. $8 \times 1 = 8$,so $10 - 8 = 2$.
$5$. Add another $0$ to the remainder,making it $20$.
$6$. $8 \times 2 = 16$,so $20 - 16 = 4$.
$7$. Add another $0$ to the remainder,making it $40$.
$8$. $8 \times 5 = 40$,so $40 - 40 = 0$.
Thus,$\frac{17}{8} = 2.125$.