7 1/2% = 3/40 = 0,075; 12 1/2% = 1/8 = 0,125; 37 1/2% = 3/8 = 0,375; 33 1/4% = 4/??
33 1/4% = 0,3325 = 133/400; 66 2/5% = 0,664 = 83/125.