tolong dijawab please pakai caranya

11.5,8 : 1/4 = 5,8 x 4 = 23,2 = 23 1/5 (C)

12. 142% = 142/100 = 1,42 = 1 42/100 (B)

13. Buku pelajaran = 100 - 45 - 25 = 30% = 30/100 = 3/10 bagian (A)