The VBA Abs function returns the absolute value of a number.
Abs(number)
Applying the Abs function to the result of a subtraction to get a positive result:
Sub AbsExample()
number1=124.54
number2=189.36
difference = Abs(number1 - number2) 'Abs(-64.82)
MsgBox difference 'Returns: 64.82
difference = Abs(number2 - number1) 'Abs(64.82)
MsgBox difference 'Also returns: 64.82
end sub