How do I fix this overfull warning that is caused by the inline math equation? When I used \sloppy on the paragraph related, underfull warning appeared instead. I've included a MWE below. If it helps, I use lualatex.
\documentclass{report}
\begin{document}
Firstly, the processing time in the Client-side Mobile Application is calculated by
substracting the end time with the start time, such as $ProcessingTime = EndTime - StartTime$
using the help of an API in React Native.
\end{document}

\(\mathit{ProcessingTime} = \mathit{EndTime} - \mathit{StartTime}\)for better kerning. – Willoughby Sep 19 '21 at 15:44Version 4.70blatexmk with-pdfluaflag. – riazufila Sep 20 '21 at 00:32