Ответ:1) 1 3/80 = 1 + 3/80 = 1 + 0.0375 = 1.0375.2) 9 4/25 = 9 + 4/25 = 9 + 0.16 = 9.16.3) 1/5 = 0.2.4) 9/20 = 0.45.5) 3/16 = 0.1875.