S.D. Codified Laws § 10-43-23.1

The property factor used in § 10-43-22.1 is a fraction, the numerator of which is the average value of the financial institution's real and tangible property owned or rented and used in this state during the tax period and the denominator of which is the average value of all the financial institution's real and tangible personal property owned or rented and used everywhere during the tax period.