<Dd> Office Open XML (OOXML) format was introduced with Microsoft Office 2007 and became the default format of Microsoft Excel ever since . Excel - related file extensions of this format include: </Dd> <Ul> <Li>. xlsx--Excel workbook </Li> <Li>. xlsm--Excel macro-enabled workbook; same as xlsx but may contain macros and scripts </Li> <Li>. xltx--Excel template </Li> <Li>. xltm--Excel macro-enabled template; same as xltx but may contain macros and scripts </Li> </Ul> <Li>. xlsx--Excel workbook </Li> <Li>. xlsm--Excel macro-enabled workbook; same as xlsx but may contain macros and scripts </Li>

What is default extension of file in excel 2010