Answer
$\frac{9}{10}$
Work Step by Step
We are given the decimal .9. In order to write this decimal as a fraction, we can divide .9 by 1 (which is equivalent to having .9 as the numerator and 1 as the denominator).
$.9\div1=\frac{.9}{1}$
Next, we multiply both the numerator and denominator by factors of 1 until both have no decimal points.
$\frac{.9}{1}=\frac{.9\times10}{1\times10}=\frac{9}{10}$
This fraction is in simplest form.
