Write down the decimal expansion of the rational number $\frac{15}{1600}$.

(N/A) To find the decimal expansion of $\frac{15}{1600}$,we perform long division:
$1$. Divide $15$ by $1600$.
$2$. Since $15 < 1600$,we place a decimal point and add zeros to $15$ to make it $15.000000$.
$3$. $1600$ goes into $15000$ nine times $(1600 \times 9 = 14400)$,leaving a remainder of $600$.
$4$. Bring down $0$ to make it $6000$. $1600$ goes into $6000$ three times $(1600 \times 3 = 4800)$,leaving a remainder of $1200$.
$5$. Bring down $0$ to make it $12000$. $1600$ goes into $12000$ seven times $(1600 \times 7 = 11200)$,leaving a remainder of $800$.
$6$. Bring down $0$ to make it $8000$. $1600$ goes into $8000$ five times $(1600 \times 5 = 8000)$,leaving a remainder of $0$.
Thus,the decimal expansion of $\frac{15}{1600}$ is $0.009375$.