# op:divide-dayTimeDuration-by-dayTimeDuration - XPath XQuery Reference

Returns the ratio of two xs:dayTimeDuration values, as a decimal
            number.Defines the semantics of the
         "div" operator when applied to two xs:dayTimeDuration values.The function returns the result of dividing the value of $arg1 by
               $arg2. The result is the xs:dayTimeDuration whose length in
            seconds is equal to the length in seconds of $arg1 divided by the length in
            seconds of $arg2. The calculation is performed by applying
               op:numeric-divide to the two xs:decimal operands.For handling of overflow and underflow, see .fn:round-half-to-even( op:divide-dayTimeDuration-by-dayTimeDuration(
                  xs:dayTimeDuration("P2DT53M11S"), xs:dayTimeDuration("P1DT10H")),
                  4)1.4378This examples shows how to determine the number of seconds in a duration.op:divide-dayTimeDuration-by-dayTimeDuration(xs:dayTimeDuration("P2DT53M11S"),
                  xs:dayTimeDuration("PT1S"))175991.0Either operand (and therefore the result) may be negative.