There is difference in results of YEARFRAC formula

There is difference in results of YEARFRAC formula

There is difference between Zoho Sheet and Microsoft Product in results of YEARFRAC formula.  You can download a test file from this  site( http://plugtest.opendocsociety.org/doku.php?id=scenarios:20100415:yearfrac ) and 

I do not know which one is right but there is difference.