What fraction of a clockwise revolution does the hour hand of a clock turn through when it goes from $3$ to $9$

We know that $12$hours$=1$full revolution

$1$hour$=\frac{1}{12}$ revolution

When we go from $3$ to $9,$

we move $6$ hours

$=\frac{6}{12}$ revolution

$=\frac{1}{2}$ revolution