Where a fractional space results during the calculation of required parking, the required number of parking spaces shall be construed to be the next highest whole number. Where the parking requirement for a particular use is not described in this article, and where no similar use is listed, the Planning Commission shall determine the number of spaces to be provided based on requirements for similar uses, location of the proposed use, the number of employees on the largest shift, the total square footage, potential customer use, and other expected demand and traffic generated by the proposed use.