How to open a .zip file which is embedded in .xlsx file?

I have a .zip file which has been embedded in a .xlsx file (excel ). But everytime I double click on the file it keeps giving this message:

Cannot start source application for this object. There may not be enough space in memory.

How can I open the .zip file? I have downloaded the unarchiver and also OpenXMLConvertor.But I dont know how to use them to extract the file.

I have Microsoft Excel 2011 (Version 14.0.0) and MAC OS X mountain lion, 64 bit , macbook air (2013). Kindly help

The thing is - all Microsoft Office documents are ZIP files containing XML files. I would try this:

• copy the XLSX to another location
• Rename the copy by addin ".zip" to it (ignore the warnings)
• unzip the copy with your favourite tool (Unarchiver or terminal "unzip ")
• look through the folder structure and find your zip file.

I followed the answer from VISHAL DAGA above, with some minor variations.

1. Change the .xlsx to .zip
2. In terminal, run unzip {{file}}
3. In the resulting folder, change your directory to xl/embeddings
4. In that folder, there should be .bin files. Run unzip {{ file }}.bin
5. Profit! The file should now be accessible in its proper, unzipped form.