Tolong jawab no 9-10 pakai cara

9. 1 4/7 : 5/14 : 7 1/2 = 11/7 : 5/14 : 15/2 = 11/7 x 14/5 : 15/2 = 154/35 : 15/2 = 154/35 x 2/15 = 308/525

10. 6/9 : 10/15 : 2 2/9 = 6/9 :10/15 : 20/9 = 6/9 x 15/10 : 20/9 = 90/90 :20/9 = 90/90 x 9/20 = 810/1800 = 9/20