In the R-E zone, if the overall net density of lots per acre meets the requirements of the particular zone classification, the minimum lot size may be reduced to 75 percent of said minimum for not more than 25 percent of the lots within the area being subdivided. (Ord. 3153 § 2 (Exh. A), 2010; Ord. 1356 § 1, 1971; Ord. 1212 § 1, 1969; prior code § 33.502(H)(2)).