With respect to appeals, a motion to reverse, affirm, or modify the order, requirement, decision, or determination appealed from shall include, insofar as practicable, a statement of the specific reasons or findings of facts that support the motion. If a motion to reverse or modify is not made or fails to receive the four-fifths (4/5) vote necessary for adoption, then a motion to uphold the decision appealed from shall be in order. This motion is adopted as the Board of Adjustment's decision if supported by more than one-fifth (1/5) of the Board's membership (excluding vacant seats).