Reciprocal (Reserved Word)
Returns the inverse value (the result of dividing 1 by a number or expression except 0).
Reciprocal(Num)
Where Num is a numeric expression representing a value to be used in the calculation.
Examples
Reciprocal(18) returns 0.06
Reciprocal(-9) returns a value of -0.11
Reciprocal(.25) returns a value of 4