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Excel

The YEARFRAC function in Excel returns the fraction of the year represented by a given date. The date can be in any valid Excel date format. The function takes two arguments: the date, and the number of days in the year. The function returns a number between 0 and 1, representing the fraction of the year that has elapsed as of the given date. For example, if you enter the date "1/1/2018" into the function, it will return the value 0.5, because January 1, 2018 is halfway through the year. If you enter the date "12/31/2018" into the function, it will return the value 1.0, because December 31, 2018 is the last day of the year.

The syntax of YEARFRAC in Excel is as follows: YEARFRAC(start_date, end_date, num_months)

Where:

start_date is the beginning date of the period you want to calculate

end_date is the end date of the period you want to calculate

num_months is the number of months in the period you want to calculate

The YEARFRAC function in Excel calculates the number of years between two dates. The function takes two mandatory arguments: the first date, and the number of years to calculate. The function will return the number of years between the two dates, as a decimal number.

For example, if you want to calculate the number of years between January 1, 2016 and January 1, 2019, you would use the following formula:

=YEARFRAC( "1/1/2016", "1/1/2019" )

This would return the value 3.

There are occasions when you should not use YEARFRAC in Excel. One instance is when you are working with a table of data that includes dates in different years. In this case, Excel will calculate the fractional part of the year for the date in the current year, which will not be accurate for the other dates in the table. Another time you should not use YEARFRAC is when you are working with a large data set. Excel may not be able to calculate the fractional part of the year for all of the dates in the data set, which could result in inaccurate calculations.

The YEARFRAC function in Excel calculates the number of years between two dates, as a decimal. This function is similar to the DATEDIF function, which calculates the number of days, months, or years between two dates. The following are some similar formulae to YEARFRAC in Excel:

- The NETWORKDAYS function calculates the number of working days between two dates.

- The EDATE function calculates the date that is the specified number of months before or after a given date.

- The MONTHFRAC function calculates the number of months between two dates, as a decimal.

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