$\dfrac{.009}{?}$=.01
.0009
.09
.9
9
Explanation:
Let$ \dfrac{.009}{x} $= .01; Then $ x $ =$ \dfrac{.009}{.01} $=$ \dfrac{.9}{1} $= .9
$\dfrac{.009}{?}$=.01
Let$ \dfrac{.009}{x} $= .01; Then $ x $ =$ \dfrac{.009}{.01} $=$ \dfrac{.9}{1} $= .9