I dislike the look of the output of the following code because the period mark following the fraction looks confused (to my eyes, at least), almost like it's trying to be a degree symbol. I wish that it was sitting on the same (invisible horizontal) line that the denominators are sitting on, only I don't want it to be inside of the denominator (that is, I don't want to write $$\frac{S}{D} = \frac{x}{360.}$$
rather than $$\frac{S}{D} = \frac{x}{360}.$$
), because that would awkwardly extend the fraction line above the period.
How can I place the period on the outside of the fraction such that it is at the same vertical level as the period in $$\frac{S}{D} = \frac{x}{360.}$$
?
\documentclass{article}
\usepackage{amsmath}
\begin{document}
Suppose I have something like $$\frac{S}{D} = \frac{x}{360}.$$
\end{document}
(Note: A closely related question is raised at Vertical position of punctuation following fractions in display-style equations, but there is no talk there of dropping the period to the floor, which is what I want.)
\raisebox{-1.6ex}{.}
\frac{x}{300\rlap{\,.}}
. But really, the period should be on the main baseline. That is what a copyeditor for a math publisher would require.\frac{\frac{a}{b}}{\frac{c}{d}}
? Should the period be placed on the baseline of the denominator of the denominator? (I hope not...)