tolong yah..........

11.] 3/4 - 4/10 = 15/20 - 8/20 = 7/20
12.] 5/8 - 1/2 = 10/16 - 8/16 = 2/16 = 1/8
13.] 7/10 - 3/6 = 21/30 - 15/30 = 6/30 = 1/5
14.] 2/4 - 3/12 = 6/12 - 3/12 = 3/12 = 1/4
15.] 2/3 - 2/4 = 8/12 - 6/12 = 2/12 = 1/6

~Semoga membantu... ○_○