TRUNC Truncates a number to an integer by removing the decimal, or fractional, part of the number.
Syntax
TRUNC(number,num_digits)
Parameters
Number – The number you want to truncate.
Num_digits – A number specifying the precision of the truncation; if omitted, 0 (zero)
Return Value
A whole number.
Reference Data
https://docs.microsoft.com/en-us/dax/dax-function-reference