$25$ out of $50$

In Excel, the YEARFRAC function calculates:

The number of whole days between two dates $($start date and end date$)$

The fraction of the year represented by the number of whole days between two dates $($start date and end date$)$

The number of whole days between the first day of the year and today

The fraction of the year represented by the number of whole days between the first day of the year and today