Step 2: Upload your presentation or spreadsheet to your public folder. Once your document is uploaded to your public folder, highlight it, in the popup options, choose Embed. (Embed is right next to the Share option)
Step 3: Copy the mark-up
On the next page, click Copy to grab the embed code (or mark-up) and copy it to your clipboard.
Step 4. Open the HTML Egg App, navigate to the web page where you wish to embed the PowerPoint file
Step 5. Add a HTML Snippet by tapping on the Add (+) button in the toolbar, then choose "HTML Snippet".
Step 6. Paste the code copied from step 3 into the HTML Snippet box.
And you are done! Congratulations!
Preview the web page to make sure everything looks perfect and you will be ready to publish your updated web page!