<b>Definition.</b><br/>A rate is a quantity, amount, frequency, or dimensionless factor, measured against two independent base unit, expressed as a quotient over a quotient. <br/><br/><b>Example.</b><br/>Evapotranspiration of 4.5 mm/day is: 0.00005208 kg / m2 / sec.<br/>Numerator value = 0.00005208<br/>Numerator Uom = kg<br/>Denumerator value = 1<br/>Denumerator Uom = m2<br/>SecondDenumerator value = 1<br/>SecondDenumerator Uom = s<br/>