I have the following text in my align environment, but it does not look good. So what should I change in order to get a better design/output?
\documentclass[a4paper,
12pt,
]{scrreprt}
\usepackage{amsmath}
\begin{document}
\begin{align}
R_ {t+1}^{simple}=\frac{\text{(asset price at t+1) $ - $ (asset price at t)}}{\text{asset price at t}} \hspace*{0.5cm}r_{t+1}^{log}=ln \left( \frac{\text{asset price at t+1}} {\text{asset price at t}}\right) \hspace*{0.2cm}
\end{align}
\end{document}