How to bring equation into the middle of the line

Question

I am trying to put this below equation in latex and also I need it in the middle of the line.

PPV =TP /(TP + FP)

Answer 1

I am not sure about having those parameters in \mathrm as the nature of those functions are not known to me. However, the equation can be centered to a line as below.

\documentclass{article}
\usepackage[showframe]{geometry} %% added to show frames.
\newcommand*{\PPV}{\mathrm{PPV}}
\newcommand*{\TP}{\mathrm{TP}}
\newcommand*{\FP}{\mathrm{FP}}
\begin{document}
This is a line of text just for reference to know that the equation below is at the center of the line.
\[\PPV = \TP / (\TP + \FP)\]
\[\PPV = \frac{\TP}{(\TP + \FP)}\]

\end{document}