By default, Microsoft Word saves all files in .docx format, Excel saves files in .xlsx format, and PowerPoint saves files in .pptx format. However, lets assume that you want to send some Excel spreadsheets to someone who has an old version of Excel. In this case, you must save the file in .xls format instead of .xlsx. Note: We have included screenshots of Excel. However, if you want to make the change in Word or PowerPoint, you must follow the same steps. The list of file extensions will be...

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