You are correct. 16 % of 1 scale inch is 1/6 of and inch. 1/4 scale inch equals 6 1/4 real inches in 1/25th scale. 1/2 inch in 1/25th scale equals 12 1/2 real inches, 3/4 of an inch in 1/25 scale equals 18 3/4 real inches and 1 inch in 1/25th scale equals 25 real inches,