To copy the contents and the formatting, choose All merging conditional formats. To combine your copied formats with existing conditional formats in the paste area, click the Merge Conditional ...

Office Q&A: How to stop Excel’s paste task from overwriting destination cell’s format Your email has been sent It's not easy to fool Excel, but with a few extra clicks, you can work around ...

In order to keep the formatting while copying things from Excel to PowerPoint, you need to select an option called Keep Source Formatting. Otherwise, it will paste texts without any formatting.